Answer:
The hijacked Flight 11 was crashed into floors 93 to 99 of the North Tower (1 WTC) at 8:46 a.m. The hijacked Flight 175 struck floors 77 to 85 of the South Tower (2 WTC) 17 minutes later at 9:03 a.m. When the towers were struck, between 16,400 and 18,000 people were in the WTC complex.
Explanation:
