You do realize bombers from the 1940s are quite a bit different in that.
A. They used a lot of wood, and aluminium construction.
B. Could not fly nearly as fast as a modern jetliner.
C. It was quite a damn bit smaller
D. It was not being flown anywere near it’s maximum speed.
E. It hit near the top, there is no where near the mass supported by the builiding structure itself.