Information about yesterday's explosions at the Boston Marathon is still trickling in, but the two big questions - who did it and why - have yet to be answered.
National security expert Scott Bates, speaking on WNPR's Morning Edition, says he expects the FBI to name a suspect fairly soon.
"We can be sure that reconstructing the videotape from closed-circuit nearby and putting together any sort of chatter that was picked up in intelligence circles," said Bates. He believes that law enforcement will "have a pretty good idea of who did this within the next 24 hours."
But Bates says given the information available at this point, its not clear whether this was a domestic or international terrorist attack:
"There are a lot of signature times for extremist groups that are really very present and very active in the United States. They're just opposed to any kind of domestic government," said Bates.
"But to tell you the truth, there are any number of other groups internationally that my attention turns to because don't forget, we still are pursuing an active war against elements of extremist Islamic tendency in places like Somalia."
Scott Bates says policy created in response to 9/11, including better coordination between local, state and federal first responders helped Boston make a smooth transition from event security, to disaster response to a massive crime scene.