Honestly?
Conspiracy theory bull.
The time between the planes hitting the buildings and the time the other airliner was "shot down" makes it impossible.
There is no way in hell that they could have scrambled fighters that fast. Think of all the red tape and whatnot it takes to put them in the air, nevermind in the air with LIVE MISSLES
There were exactly 0 red alert flights being flown anywhere within intercept range.
The amount of crap they'd have to go through to get permission to fly is rediculous, nevermind granting permission to shoot down the airliner.
Whats next? Secret AA sites around the country?
And how someone got that that was a tanker from an absolutely horrific photo is beyond me.
Some joker with photoshop and wannabe knowledge from his airforce books dosen't count as an "analyst".
Also, shooting down planes over populated land dosen't happen.