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Two planes hit the twin towers.

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At 9:59 the south tower collapsed in 10 seconds killings lots of fire fighters

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Climbing stairs in clad heavy protective clothing and carrying equipment was a grueling task, even for physically fit firefighters.

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The south tower fell at 9:59 in 10 seconds, and the north tower fell 1 minute after.

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FDNY officials radioed the firefighters to get out of the north building, worried that the tower would collapse as well.

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When attempting to reach particular parts of the unit, chiefs in the lobby heard nothing in response because of communication difficulties

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The steel frames and steel-reinforced concrete interfered with the signals.

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At 9:59 am the south tower collapsed in about 10 seconds

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At 9:59am the south tower disintegrated and had collapsed into itself within 10 seconds

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Floors 93 to 99 were hit by the first plane in the North Tower.

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The firefighters heroic efforts saved thousands of lives

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The chiefs were trying to get ahold of the firefighters but they never got a response because the radio commutation was cut off.

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17,400 people were in the towers and 87% were safely evacuated

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Walking down very dirty stairs while wearing very heavy firemen clothes because your sigma

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When the south tower fell, the firefighters in the north tower didn’t know it fell, but could feel a powerful jolt

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Some units delayed their own evacuation

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“Radio communication became difficult”

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Firefighters in the north tower who weren’t near windows didn’t know the south tower collapsed till after the attack was over.

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There was no way to escape.🫢

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Only certain firefighters knew about one of the buildings collapsing because they were near the window

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Radio communion was hard to communicate through the higher the firefighters went.

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The heavy equipment you have to wear as a firefighter weighs about 67 pounds.

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The south tower suddenly collapsed

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Bodies weren’t recovered until months later

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Some Firefighters were separated from their units. 🤷‍♀️

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The radio communication became hard to hear as they went higher into the two buildings.

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It was hard to carry the gear up the stairs