CNN speculating on lack of exit plan and suggesting the folks who were part of that plan flew the coop. Anderson Cooper quickly covers for that suggestion and changes subject.
It seems clear the perps didn't think they needed an exit plan. Jokhtar was tweeting normally AFTER the bombing.
These guys dropped their bombs and just walked home. They figured the Americanskys are too degenerate and stupid to catch them.
I think they were going about their business and probably deciding what to attack next and were caught off guard by the broadcasting of the FBI photos.