Question

How many planes were involved in 9/11?

Answer 1

4 1 in Pennsylvania, 1 hit the pentagon, and 2 at the World Trade Center 1 hit each tower.

Answer 2

There were four planes involved in 9/11.
-American Airlines Flight 11 – World Trade Center - North Tower
-United Airlines Flight 175 – Two World Trade Center
-American Airlines Flight 77 – Pentagon
-United Airlines Flight 93