1) Yes, Fox is reporting two sources saying the pilot radioed an SOS...
2) There's an awful lot of sky up there. Even if you're in trouble it's still pretty hard to find the little bit of sky that's occupied by a building...
3) "If the report that he hit the top two floors is accurate" -- Don't forget, after the WTC attack, ALL the news shows had well-produced animation SHOWING how an attack of the UPPER floors causes a CHAIN REACTION of floors collapsing downward which leads to the building falling down... Perhaps this person was just trying to knock the building down using the same method as the WTC attack...
Mark W.
My thoughts exactly. Until I see proof to the contrary, my opinion is that this was deliberate.