I think ABC may really asking if the Empire State Bldg didn't collapes when hit by a B52 why did the WTC buildings fall?
I think ABC may really asking if the Empire State Bldg didn't collapes when hit by a B52 why did the WTC buildings fall? B-25's and B-52's are two completely different animals.
A fully loaded B-52 hitting the empire state building, brings it down.
A B-25 is small and light in comparison.