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In the field the officers/police did not find any survivors. The leader of the attack was later shoot and killed . This tragic moment has suprised everyone in the world . Wondering why another human would hurt over thousands of people .

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Contents

1. War Department Looks for a Home

2. The Pentagon Takes Shape

3. Pentagon Construction Begins: September 11, 1941

4. The Pentagon after the War

5. James Forrestal

6. Protestors March on the Pentagon

7. Renovation of a Landmark

8. September 11th and Rebuilding

The Pentagon is the Virginia headquarters of the U.S. Department of Defense, located in a massive five-sided concrete and steel building that's a potent symbol of America's military strength. With more than 6 million square feet of floor space, the Pentagon ranks among the largest office buildings in the world. During the terrorist attacks of September 11, 2001-60 years to the day after construction began on the Pentagon-a hijacked plane struck the building, killing 189 people and damaging roughly one-third of the building.

War Department Looks for a Home

On May 27, 1941, three weeks after Germany's surprise attack on the Soviet Union, U.S. President Franklin D. Roosevelt declared a state of national emergency. World War II was in full swing, and Adolf Hitler 's Nazi Germany had already occupied much of continental Europe.

The U.S. War Department was growing rapidly, with 24,000 personnel scattered among 17 buildings in Washington, D.C. By the beginning of the next year, that number was expected to reach 30,000.

Did you know? Construction on the Pentagon began on September 11, 1941, 60 years to the day before the terrorist attacks of September 11, 2001.

Roosevelt himself had personally approved construction of a new War Department facility at 21st Street in the city's Foggy Bottom neighborhood. Built for $18 million, it was set to open in June 1941. By that time, however, the building was deemed far too small. (In 1947, it would become the headquarters of the U.S. State Department.)

General George C. Marshall, the Army's chief of staff, turned to Brigadier General Brehon B. Somervell, head of the Army's Construction Division, for a solution.

Somervell's proposal was audacious: a headquarters big enough for 40,000 people, with 4 million square feet of office space. A building this large could not fit in Washington, so Somervell chose a site across the Potomac River in Virginia, just east of Arlington National Cemetery.

Known as Arlington Farm, the plot of land was once part of the grand estate of the Confederate general Robert E. Lee.

The Pentagon Takes Shape

When Somervell's lead architect, G. Edwin Bergstrom, drew up the design for the building, he was forced by the position of existing roads at the site to use an asymmetrical five-sided shape. Somervell had determined that the building could be no more than four stories high, both to accommodate a wartime scarcity of steel and to prevent blocking the views of Washington, D.C.

The three-story building would be completed, he claimed, within a year, with 500,000 square feet ready for use within six months.

The House of Representatives passed the necessary legislation for the project on July 28, 1941; the Senate on August 14. By that time, however, controversy had arisen over the scale of the building, as well as its location so close to the hallowed ground of Arlington National Cemetery.

Moved by the protests, Roosevelt declared that the project should be moved to a site three-quarters of a mile south of Arlington Farm, adjacent to Washington-Hoover Airport. He also directed Somervell to reduce the size of the building to no more than 2.25 million square feet.

Although the new site, known as Hell's Bottom, did not require the unique shape of the building's design, time was tight and things went ahead as planned. Bergstrom's team made the pentagon symmetrical, with multiple concentric pentagons placed inside one another, interlaced with corridors and surrounding a courtyard.

A pentagonal shape meant shorter interior distances than with a rectangle, while the straight sides were easier to build than a circular building; the shape also recalled traditional fortress constructions, as well as Civil War-era battlements.

Pentagon Construction Begins: September 11, 1941

Construction on the Pentagon began without fanfare on September 11, 1941. By early December 1941, 3,000 workers were on the site during the day, but construction was still behind schedule. Their supervisor was Corps of Engineers Colonel Leslie R. Groves, who would later be chosen to head the Manhattan Project and build the atomic bomb.

On December 7, the Japanese attacked Pearl Harbor, and the acceleration of the U.S. move toward war gave Somervell free reign to expand his project. The already-tight construction schedule was moved up, and by March 1942, more than 10,000 people were working on the site. At one particularly intense stage, 15,000 people were working three shifts, 24 hours a day, with floodlights illuminating the site at night.

The Pentagon's first employees moved in on April 30, 1942; the building officially opened on January 14, 1943. Its massive bulk-6.24 million gross square feet-held 410,000 cubic yards of concrete, made from some 700,000 tons of sand dredged from the Potomac River.

From the $35 million Somervell had originally proposed, costs had ballooned to $75 million, though some claimed it was even higher.

The Pentagon after the War

Many wondered what to do with the Pentagon after the war ended, as the common view was that the War Department would have no need for a building so large in peacetime. Some said it should be converted into a hospital, a university or headquarters for the Veterans Administration, but the Army had no intention of giving it up.

In September 1947, Congress passed the National Security Act, ushering in the single biggest military reorganization in American history. The act created the National Military Establishment, split the Air Force from the Army, formally established the Joint Chiefs of Staff and created the Central Intelligence Agency (CIA) and the National Security Council.

In the post-World War II era, the Pentagon's role was shaped decisively by growing Cold War tensions, as the wartime alliance with the Soviet Union disintegrated into a fierce rivalry, fueled by the nuclear arms race and the growing number of U.S. security commitments around the world.

James Forrestal

To provide a strong center for the military establishment, President Harry Truman wanted the Navy, Army and Air Force all to be headquartered in the Pentagon. James Forrestal, the nation's first secretary of defense, took on that monumental task.

Though Forrestal would be remembered by many as the "godfather" of the national security state, the great strain of the job exacerbated his existing mental illness, and he soon exhibited unmistakable signs of decline. After Truman replaced him with Louis Johnson in January 1949, Forrestal suffered a nervous breakdown; four months later, he committed suicide.

Despite this inauspicious start, the defense establishment continued to solidify itself, especially after August 1949, when the Soviet Union exploded an atomic bomb in Siberia. On August 10, Truman signed a law giving the secretary of defense total power over the armed forces and renaming the National Military Establishment the Department of Defense.

On the heels of North Korea's invasion of South Korea in June 1950, the Pentagon staff returned to wartime highs; it would eventually reach 33,000.

By the time the Korean War ended, the building had become a tourist attraction, with people strolling its grounds and inner courtyard, and gawking at its massive size. It had also become an unmistakable symbol of America's growing military dominance in the world, a development that was celebrated by many and feared by many more.

Protestors March on the Pentagon

On October 21, 1967, at the height of the United States' controversial involvement in the Vietnam War, some 35,000 antiwar protesters rallied around the Lincoln Memorial and marched across the Memorial Bridge toward the Pentagon. Meanwhile, more than 2,000 federal troops gathered inside the building, armed with tear gas.

One of the protesters, Norman Mailer, chronicled the march in his classic book The Armies of the Night. In Mailer's eyes, the Pentagon-more than the White House-embodied the totalitarian nature of the U.S. approach to the Vietnam War: "Every aspect of the building was anonymous, monotonous, massive, interchangeable."

When the crowd surged toward the building, soldiers met them with bayonets fixed to their rifles. Sporadic violence continued into the night, but by the time the last protesters were arrested, the building's defense had been a success: no one had been killed and not a shot had been fired.

However, the incident only worsened relations between antiwar protesters and the government. In May 1972, an antiwar group called the Weather Underground placed a bomb in a women's restroom at the Pentagon. It exploded at 1 a.m., injuring no one but causing some $75,000 in damages.

Renovation of a Landmark

America's next large-scale military deployment came in 1990 with the launch of Operation Desert Shield in the Persian Gulf War. By that time, it had become increasingly apparent that the aging infrastructure of the Pentagon-proclaimed a National Historic Landmark in 1992-was in need of a sweeping renovation to meet the challenges of a new age.

Work began in October 1994, after Congress approved more than $1 billion for the effort. As before, the renovation went far beyond its original timeline and way over budget, especially after security precautions were stepped up after U.S. embassy bombings in Kenya and Tanzania in 1998.

September 11th and Rebuilding

By September 11, 2001, the renovations were in their final stages. That day-shortly after the attack on the World Trade Center in New York City-American Airlines Flight 77 crashed into the Pentagon's first floor west wall at 9:37 a.m.

Traveling 529 miles per hour at the time of the impact, the hijacked Boeing 757 made a gash 30 yards wide and 10 yards deep, puncturing the three outer rings of the building. The resulting fire raged for 36 hours, and by the time it was extinguished, 189 people were dead: 135 Pentagon workers and 64 people on the plane (including the five hijackers).

A $501 million repair and renovation initiative, dubbed the Phoenix Project, began in early October 2001. Its leader, Lee Evey, publicly declared on October 5 that the goal was to have repairs completed by September 11, 2002.

His team's considerable efforts were largely successful. By then, the Pentagon's focus was already changing from hunting al-Qaeda in Afghanistan to gearing up for the coming war in Iraq.

The Phoenix Project was officially completed in February 2003 at a total cost of some $5 billion. The renovations included sweeping security upgrades, including a move of the Defense Department's command centers to the basement.

In March 2003, designs were revealed for a September 11 memorial, including 184 illuminated benches, one for each victim, set above a series of illuminated pools. Ground for the memorial project was broken in June 2006, and it was opened to the public on September 11, 2008.

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War Department Looks for a Home The Pentagon Takes Shape Pentagon Construction Begins: September 11, 1941 The Pentagon after the War James Forrestal Protestors March on the Pentagon Renovation of a Landmark September 11th and Rebuilding The Pentagon is the Virginia headquarters of the U.S.

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A total of 4 planes crashed that day .Two planes crashed into the twin towers causing over 3,000 people to die. The other two planes crashed into the pentagon and the other one crashed into the field.

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Other terrorist groups where so surprise and thrilled that they accomplished this attack without getting caught.

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The Islamic State of Iraq and Syria is flush with cash, and holds as much as $2 billion. Counterterrorism officials say the group knows how to use that money to its advantage. It's showing a kind of professional acumen and discipline that sets it apart from other terrorist organizations. But what kinds of attacks can its money buy?

Back in 2006, when Germany was hosting the World Cup soccer tournament, a terrorist attack was narrowly averted. With bombs hidden in their suitcases, two men in their 20s boarded commuter trains in the city of Cologne.

Richard Barrett was on a U.N. team that tallied up the costs of terrorist attacks, including that 2006 attempt in Germany.

"These suitcases were meant to blow up a train, and clearly that would have created a huge amount of damage and public anxiety and so on for very, very little cost," he says.

You have a group and a movement that is gaining a foothold in the heart of the Middle East with the resources to give manifestation to their wild imaginings.

By very, very little cost he means less than $500.

The bombs were simple: a propane tank, alarm clock, batteries and a plastic bottle filled with gas. In fact, Barrett says, one of the men used part of his school tuition money to pay for it all.

"It just shows you that attacks do not have to cost the $500,000 or $400,000 that people believe 9/11 cost," he says.

Even bigger, more spectacular attacks cost less than you'd think. Take the attack on the London transportation system in 2005 that killed 57 people and injured hundreds. The U.N. estimated that cost a total of about $14,000.

"It was self-financed, one of the guys was relatively well-off, his family was relatively well-off, and I think he may even have been a teacher as well, so he had a salary coming in," Barrett says.

Mohammed Sidique Khan was a teaching assistant, but he was able to finance one of the deadliest terrorist attacks against the West since the attacks of Sept. 11, 2001 - which is why it's worrisome that ISIS may have millions of dollars available to fund attacks.

Just consider the cost of improvised explosive devices on the battlefield: The Joint Improvised Explosive Device Defeat Organization, a Pentagon organization, published a kind of price list for attacks in Afghanistan in 2012. What they discovered: a remote-controlled bomb costs about the same as a top-of-the-line iPhone 5 - or $400.

A suicide bombing vest can run as little as $1,200. A suicide car bomb, between $13,000 and $20,000. The big variable, the report said, is the cost of the car.

So for ISIS, with its reported $2 billion war chest, basically the only limit on the number of attacks it can launch is the number of people willing to carry them out. That, says Juan Zarate, a fellow at the Center for Strategic and International Studies, is the danger ISIS presents.

"You have a group and a movement that is gaining a foothold in the heart of the Middle East with the resources to give manifestation to their wild imaginings," Zarate says.

What's unclear is where those imaginings lead. ISIS has aspirations for setting up an Islamic state in Iraq, and it has talked about becoming a regional power, says Bruce Hoffman, director of the Security Studies Program at Georgetown University.

"I think the main question right now is whether it focuses its energies and assets on gaining further ground in Iraq as opposed to spreading its wings and attacking further afield," Hoffman says - far enough afield to include the West.

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How Much Does A Terrorist Attack Cost? A Lot Less Than You'd Think

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The Islamic State of Iraq and Syria is flush with cash, and holds as much as $2 billion. Counterterrorism officials say the group knows how to use that money to its advantage. It's showing a kind of professional acumen and discipline that sets it apart from other terrorist organizations.

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How did different groups view the attack?

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How did different groups view the attack?

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Different terrorist groups saw this as a amazing attack because they killed many people. Their goal is to hurt people especially innocent people.

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On 9/11 two planes crashed into the twin towers causing over 3,000 innocent people to die.

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Découvrez et enregistrez des idées à propos de Twin towers collapse sur Pinterest, le catalogue d'idées.

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How did the events of 9/11 change American attitudes toward Islam?

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How did the events of 9/11 change American attitudes toward Islam?

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Most Americans no longer trust Islam. Because of their actions towards New York. The Islam group killed over 3,00 innocent people.

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Regular people boycotting for Muslims to let them come to America. Because not all Muslims want to bring harm to America.

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President Donald Trump issued a statement on Sunday arguing that his executive order banning citizens of seven countries from the United States is not a "Muslim ban," as it has been widely termed.

Trump's order bans travelers from Iraq, Iran, Libya, Somalia, Sudan, Syria, and Yemen from entering the U.S. for 90 days, and bans refugee admissions for 120 days. Under the order, Syrian refugees are banned indefinitely.

Trump - and some congressional Republicans  - are arguing that it is not a Muslim ban because there are many Muslim majority countries that are not on the list.

This is true: there are many Muslim majority countries that are not Trump's list of banned travelers - including all of the Muslim-majority countries where Trump does business. The list includes none of the countries from which the 9/11 hijackers originated, despite the fact that Trump specifically invoked 9/11 multiple times while signing the order.

The executive order he signed on Friday, however, arbitrarily bans millions of Muslims from the United States. And while it may not be the exact blanket ban he first promised, it's still an evolution of his call to ban all Muslims from the United States.

Trump's Muslim ban proposal during the campaign

On December 7th, 2015, Trump called for a "total and complete shutdown of the entry of Muslims to the United States."

"Without looking at the various polling data, it is obvious to anybody the hatred is beyond comprehension," President Trump said in the press release, implying that all Muslims must hate the U.S. There's no evidence to support this claim, though Trump has used this kind of rhetoric for years drum up Islamophobia.

Islam is the world's second-largest religion, and Muslims make up almost a quarter of the world's population. There are around 3.3 million Muslims living in the United States, according to Pew.

There was widespread outcry against Trump's campaign proposal, especially because it sounded like a religious test-clearly in violation of the Constitution. Over time, he walked it back, and the full ban evolved into "extreme vetting" for anyone immigrating to the U.S. from "areas of the world where there is a proven history of terrorism against the United States, Europe, or our allies."

But in changing his proposal, Trump made a political concession without making a functional one, as Dara Lind explains for Vox. Banning people from the U.S. based on religion would, in all likelihood, been quickly found unconstitutional. By shifting from focusing on religion to focusing on country of origin, the ban was on much more stable legal ground.

The country ban is a fig leaf for a Muslim ban-and Trump's own surrogates are starting to confirm as much. This Saturday, prominent Trump surrogate Rudy Giuliani told Fox News in an interview that Trump called him and asked him how to legally implement his proposed Muslim ban when he first announced it.

"I'll tell you the whole history of it: When he first announced it, he said 'Muslim ban,'" Giuliani said on Fox News. "He called me up, he said, 'Put a commission together, show me the right way to do it legally.'"

"What we did was we focused on, instead of religion: danger. The areas of the world that create danger for us, which is a factual basis, not a religious basis. Perfectly legal, perfectly sensible."

In addition to Giuliani telling Fox that the current order is the legal evolution of Trump's original proposal, since Trump signed the executive order Michael Flynn Jr., son of Trump's National Security Adviser, has tweeted twice about Trump's "Muslim ban."

He has shut down his twitter account since tweeting about the Muslim ban.
(Editor's note: ThinkProgress has also adopted a policy of describing the policy as Muslim ban, in recognition of its intended effects.)
Trump's ban initially shut out green card and visa holders

The language of Trump's original executive order is broad, and as such affects green card holders and people who already have visas from the seven banned countries from entering the country.

The White House was initially firm on this line: Senior officials at DHS at first interpreted Trump's executive order to exclude green card holders, who are legal, permanent residents of the U.S. The White House overruled them.

Over the weekend, this resulted in travelers and legal residents who were out of the country when Trump signed the order being prevented from boarding planes and being detained on arrival in the U.S., under threat of deportation.

Homeland Security Secretary John Kelly issued a statement on Sunday clarifying that green card holders returning to the U.S. may be let in on a case-by-case basis and subjected to extra screening.

"Lawful permanent resident status will be a dispositive factor in our case-by-case determinations," said Kelly.

For green card holders, the shift from being able to come and go freely to a promise of "case-by-case" system is unlikely to be reassuring.

The broad nature of Trump's order, however, is yet another call back to his original Muslim ban.

When the ban was initially proposed, Trump's spokeswomen Hope Hicks said that, according to Trump, the Muslim ban would include " everyone " - meaning that Muslim green-card holders and Muslim-American citizens living abroad would also be banned from entry.

Trump later said that Muslim-American citizens would be able to come back: "They are a citizen, that is different," he said on Good Morning America. Green card holders and current visa holders already in the country, however, are not citizens.

Trump's order would give preference to Christian refugees

Trump's order suspends refugee admissions for 120 days, during which he's ordered a review of the process "to determine what additional procedures should be taken."

The vetting process for refugees resettled in the United States is already extremely extensive, typically taking from 18 to 24 months and winding through several national and international government and security agencies. Refugees also don't get to choose what country they go to - that decision is made by the United Nations High Commission on Refugees.

When refugee admissions are resumed (which will still exclude Syrian refugees), however, Trump's order directs that non-Muslims be given priority (emphasis added by ThinkProgress).

"Upon the resumption of USRAP admissions, the Secretary of State, in consultation with the Secretary of Homeland Security, is further directed to make changes, to the extent permitted by law, to prioritize refugee claims made by individuals on the basis of religious-based persecution, provided that the religion of the individual is a minority religion in the individual's country of nationality. "

Trump said in an interview with Christian Broadcasting Network on Friday that he believes Christians have a harder time being admitted to the U.S. as refugees.

"Do you know if you were a Christian in Syria it was impossible, at least very tough to get into the United States? If you were a Muslim you could come in, but if you were a Christian, it was almost impossible" Trump said. "And I thought it was very, very unfair."

There is no evidence to support Trump's claim that Christians were previously discriminated against in the process, and the U.S. has admitted Syrian Christians since it began admitting Syrian refugees, counter to Trump's claim that it was "almost impossible."

Trump's Muslim ban

Trump's statement on Sunday blamed the widespread outcry against his Muslim ban on the media.

"To be clear, this is not a Muslim ban, as the media is falsely reporting. This is not about religion - this is about terror and keeping our country safe," he said.

To recap: Trump campaigned on a promise of a Muslim ban. On Friday, he signed an executive order that broadly excludes millions of travelers from seven majority Muslim countries and orders that of those majority-Muslim countries, non-Muslim refugees be given preference for resettlement.

After Trump signed the order, spontaneous protests broke out in cities and airports across the U.S., as thousands of people crowded in and and around airports to welcome travelers and protest against their detainment.

Trump, meanwhile, angrily tweeted that the coverage of him in the New York Times and Washington Post - which was largely focused on the negative repercussions of the ban - was "fake news."

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Trump, who campaigned on a Muslim ban, says to stop calling it a Muslim ban

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President Donald Trump issued a statement on Sunday arguing that his executive order banning citizens of seven countries from the United States is not a "Muslim ban," as it has been widely termed. Trump's order bans travelers from Iraq, Iran, Libya, Somalia, Sudan, Syria, and Yemen from entering the U.S.

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How did America's relationship with Muslim countries change after the attack?

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How did America's relationship with Muslim countries change after the attack?

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America's relationship with the Muslims changed after the attack changed because america no longer trusted Muslims.