Premise: One World Trade Center ( also known as 1 World Trade Center , 1 WTC or Freedom Tower ) is the main building of the rebuilt World Trade Center complex in Lower Manhattan , New York City . September 11 attacks . were a series of four coordinated terrorist attacks by the Islamic terrorist group al-Qaeda on the United States on the morning of Tuesday , September 11 , 2001 . Two of the planes , American Airlines Flight 11 and United Airlines Flight 175 , were crashed into the North and South towers , respectively , of the World Trade Center complex in New York City . A third plane , American Airlines Flight 77 , was crashed into the Pentagon ( the headquarters of the United States Department of Defense ) in Arlington County , Virginia , leading to a partial collapse of the building 's western side .
Hypothesis: The September 11 attacks took place in the United States.
Label: ENTAILMENT