You are right on target with your question, Tom. Just how big was this bomb? Did you see the photos of the destruction? Wow! Heavy stuff!
Of course, the construction over there is probably pretty flimsy, but that bomb(s) really did some horrific damage over a pretty wide area.
Yes, I agree the whole story is not yet out.
Leni
Im sure it was a large bomb, but the place they blew up was packed with people at the time.