The possibility of another 9/11 became non-viable about 10 minutes after a second plane hit the WTC. It's the reason Flight 915 didn't make it to Washington DC.

The possibility of another 9/11 became non-viable about 10 minutes after a second plane hit the WTC. It's the reason Flight 915 didn't make it to Washington DC. The passengers on 915 received the news of what was happening in NYC and the Pentagon and rushed the cockpit and the terrorists. You can't hold a plane hostage if the occupants know you are taking them on a suicide mission.