From cruise altitude to impact was 8 minutes.
ATC noticed altitude deviation at about 6 minutes prior to impact.
Now allow 3-4 minutes for ATC to attempt contact with pilot and failing to do so...still very early to get highly alarmed, but I'll give it to you.
We are now at 2 - 3 minutes to impact....
Do you REALLY think it even remotely possible for an ATC facility to contact a military facility, convince them it's a real problem, and then for the military to react.....all of these things in 2 to 3 minutes?????
Military involvement is not feasible.