actually, that is an important fact - how big was this bomb? a pipebomb is alot different then a suicide vest filled with C4.
I wouldn't call that a fact yet. This guy probably knows what he is talking about, but sound can do funny things. He was at the game. He had to leave his car there as it was about 100 yards from where he believes the blast was.
As an aside, I've heard that the second device was detonated. When they do this they use extra explosives to make sure the job gets done completely. This may be what he heard, but it's not really adding up like that as he said that police left the sidelines just after the explosion he heard. Still really fuzzy.
This was no pipe bomb -- the person got blown into small pieces and it was LOUD in the stadium. The first news reports said they couldn't tell if it was a man or woman that was blown up.
Just got this in a FReepmail. This keeps moving further and further from some depressed kid with a pipebomb.