There wasn't anything sophisticated about the bombing. It required no engineering degree to make the small bombs they used. There was no connection to any of the terrorist groups other then the crap that they absorbed from them. They were 2 stupid kids who wanted to be real terrorists but they didn't have the guts that a real terrorist would have. They placed the bombs and got out of the way instead of going off with them. This thing could have been pulled off by anyone with a sick mind and internet access.
