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In the 1900s (WHEN), Bill Clinton (WHO) was elected as the 42nd president (WHAT) in America (WHERE). He was significant because he had signed the  agreement of NAFTA, which allowed trade between the U.S., Canada, and Mexico without any barriers (WHY).

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In the 2000s (WHEN), George W. Bush (WHO) was elected as the 43rd president (WHAT) in America (WHERE). He was significant because he established his declaration against terrorism which led to the liberation of Afghanistan and the invasion of Iraq (WHY).

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In the 1900s (WHEN), Lyndon Johnson (WHO) was elected as the 36th president (WHAT) in America (WHEN). He was significant because he had led the Vietnam War after John F. Kennedy had been assassinated (WHY).

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In the 1900s (WHEN), Senator Joseph McCarthy (WHO) was a politician for Republicans (WHAT) in America (WHERE). He was significant because he had accused many Democrats as communists in the government (WHY).

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In the 1900s (WHEN), Ronald Reagan (WHO) was elected as the 40th president (WHAT) in America (WHERE). He was significant because he cut out welfare and public works programs since he supported tax cuts (WHY). He had also met Gorbachev to help stop the Cold War.

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In the 1900s (WHEN), Richard Nixon (WHO) had been elected as the 37th president (WHAT) in America (WHERE). He was significant because he had established his "Vietnamization" policy, which brought an end to the Vietnam War (WHY) .

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In the 1900s (WHEN), John F. Kennedy (WHO) was the first Catholic president (WHAT) in America (WHERE). He was significant because he had led the U.S. troops in the Vietnam War until he was assassinated (WHY).

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In the 1900s (WHEN), Harry Truman (WHO) had been elected as the 33rd president (WHAT) in America (WHERE). He was significant because during the time he served, he led U.S. through the last moments of WWII and led the decision to drop two atomic bombs on Japan (WHY). He also implemented the Marshall Plan to help Europe recover.

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In the 1900s (WHEN), George H.W. Bush (WHO) was elected as the 42nd president (WHAT) in America (WHERE). He had also signed ADA to prohibit discrimination from handicaps where they could gain equality (WHY).

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In the 1900s (WHEN), Fidel Castro (WHO) had overthrew a corrupt regime (WHAT) in Cuba (WHERE). This was significant because he became leader of the communist state (WHY).

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In the 1900s (WHEN), Ethel and Julius Rosenburg (WHO) were communists (WHAT) who were executed. This was significant because they had provided information about the American atomic bomb to the USSR (WHY).

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In the 1900s (WHEN), Alger Hiss (WHO) was accused of being a communist spy (WHAT) in America (WHERE). This was significant because he was convicted of perjury for providing classified documents to the USSR (WHY).

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In the 1900s (WHEN), NAFTA was an agreement (WHAT) established by the Senate (WHO) in America (WHERE). This was significant because it eliminated barriers between the U.S., Canada, and Mexico so there could be a free trade zone (WHY).

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In the 1900s (WHEN), President Nixon (WHO) had been caught up in a scandal (WHAT) in America (WHERE) where he had reportedly hired people to into the Democratic HQ at the Watergate Hotel and several other scandals getting exposed. This was significant because Nixon had to resign from his position (WHY).

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In the 1900s (WHEN), President Nixon (WHO) had established a policy (WHAT) called Vietnamization. This policy was significant because Nixon withdrew American troops from Vietnam (WHERE) and slowly letting South Vietnam to fight their own war with the U.S.' funding they provided for them (WHY).

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In the 1900s (WHEN), the Vietnam War had been under two presidents: Kennedy and Johnson (WHO). The Vietnam War was to prevent the spread of communism (WHAT) in South Vietnam (WHERE) from North Vietnam (WHY), just like the Korean War.

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After WWII ended (WHEN), the United Nations was an organization (WHAT) which had been established by President Roosevelt (WHO) in America (WHERE). This was due to the reason of trying to prevent further wars and maintaining peace (WHY).

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In the 1900s (WHEN), Harry S. Truman (WHO) had established a doctrine (WHAT) called the Truman Doctrine in America (WHERE). This was established because they wanted to contain communism (WHY); so they supported any countries that were threatened by communism.

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In the 1900s (WHEN), NATO was an organization (WHAT) formed due to expansion of communism (WHY) which included 11 western (WHERE) nations by the U.S. (WHO). As a response to NATO (WHY), USSR and other communist nations (WHO) had formed an organization (WHAT) called the Warsaw Pact in Eastern Europe (WHERE0.

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In the 1900s (WHEN), President Eisenhower (WHO) had established a policy (WHAT) in America (WHERE) in response to the Soviet Union aggression (WHY). They had threatened the aggression by announcing that they would retaliate with nuclear weapons.

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In the 1900s (WHEN), George C. Marshall (WHO) had issued the "Marshall Plan" (WHAT). This was established because it helped Europe (WHERE) with reconstruction after the post-war (WHY).

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In the 1900s (WHEN), the Korean War had occurred between North and South Korea (WHERE). The U.S. (WHO) had sided with South Korea (WHO) because they didn't want communism (WHAT to spread (WHY), while Communist China (WHO) and USSR (WHO) had sided with North Korea (WHO) to encourage communism (WHY).

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In the 1900s (WHERE), the Soviet Union (WHO) had issued a policy (WHAT) called Glasnost/Perestroika. This policy was issued because it allowed the reconstruction of their economy where they introduced free-market and openness (WHY) in Russia (WHERE).

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In the 1900s (WHEN), the U.S. and Soviet Union leaders (WHO) had tensions surrounding them. This was due to the reason of the Soviet Union installing nuclear weapons (WHAT) on Cuba (WHY/WHERE). Many Americans were fearful of the U.S. participating in a nuclear war; however, the Soviet made a deal that if the U.S. didn't invade Cuba then they would remove their weapons.

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In the 1900s (WHEN), American Central Intelligence (WHO) had decided to invade Cuba (WHERE). However, the invasion (WHAT) was a fail because they were significantly outnumbered by Fidel Castro's troops (WHY).