...looks like 2 floors and maybe 4 or 5 apartments ablaze
Witness on MSNBC said that it didn't look like the copter or plane was aiming for the building, but appeared to be in distress and striking more of a glancing blow. Was descending at a steep angle, with an odd noise.
But of course Freepers who weren't there will immediately claim that the gov't is covering up a terrorist act.