> On 9/11 4 aircraft were hijacked, only 1 had passengers resist.
Few had much inkling 9/11 was a terror attack until the second flight hit WTC at 9:03 am, so it's really one of two. The Pentagon flight hit at 9:37 am and passengers weren't aware of the WTC attacks until Barbara Olson's call between 9:16 and 9:26. ~10 minutes isn't much time to process, plan, and react.
Few had much inkling 9/11 was a terror attack until the second flight hit WTC at 9:03 am, so it's really one of two. The Pentagon flight hit at 9:37 am and passengers weren't aware of the WTC attacks until Barbara Olson's call between 9:16 and 9:26. ~10 minutes isn't much time to process, plan, and react.
Post-9/11, attackers in https://en.wikipedia.org/wiki/2001_failed_shoe_bomb_attempt and https://en.wikipedia.org/wiki/Northwest_Airlines_Flight_253 were both subdued rapidly by passengers, as have a variety of disruptive/suspicious non-terror incidents.