Flight 11 was crashed 30 minutes after hijacking, 175 20 minutes, 77 about 45 minutes, and 93 about 35 minutes later. Even if you tighten the loop between a hijacking and getting a fighter jet in the air to counter it, it will still take you about 15 minutes at best to do it.
Then you're left with the problem of figuring out which one of the contacts on your military radar doesn't have a transponder. Go to a map like <https://flightaware.com/live/> and observe the Ohio/Pennsylvania airspace in the middle of the day. You have 15 minutes to figure out the hijacked flight, guess its flight path, and then order fighters to intercept it and shoot it down.
Quite frankly, if a plane gets hijacked in the Northeast, there is no way you can get a military jet to shoot it down in time.
Flight 11 was crashed 30 minutes after hijacking, 175 20 minutes, 77 about 45 minutes, and 93 about 35 minutes later. Even if you tighten the loop between a hijacking and getting a fighter jet in the air to counter it, it will still take you about 15 minutes at best to do it.
Then you're left with the problem of figuring out which one of the contacts on your military radar doesn't have a transponder. Go to a map like <https://flightaware.com/live/> and observe the Ohio/Pennsylvania airspace in the middle of the day. You have 15 minutes to figure out the hijacked flight, guess its flight path, and then order fighters to intercept it and shoot it down.
Quite frankly, if a plane gets hijacked in the Northeast, there is no way you can get a military jet to shoot it down in time.