House Homeland Security Chairman Rep. Michael McCaul (R., Texas) revealed he believes based on the nature of the pressure cooker devices the Tsarnaev brothers had a "trainer" Sunday on FNC.
McCaul noted the pressure cooker bombs used in Boston bear resemblance to devices in used in Pakistan and Afghanistan, suggesting a potential foreign connection:
CHRSI WALLACE: Let's turn to the continuing investigation in Boston. The FBI now says the toy remote-controllers were used, and I think we have a picture of the components of the bomb, toy remote controllers were used to detonate the bombs, more sophisticated than what's in that online Al-Qaeda linked magazine. Congressman McCaul, you have said all along there's a foreign connection to these attacks. Do you have any more information about who and where, and what do you know about the mother's role?
MICHAEL MCCAUL: I think given the level of sophistication of this device, the fact that the pressure cooker is a signature device, goes back to Pakistan,m Afghanistan, leads me to believe, and the way they handled these devices and the trade craft, leads me to believe that there was a trainer. The question is, where is that trainer or trainers? Are they overseas in the Chechen region or are they in the United States? In my conversations with the FBI, that's the big question. They've casted a wide net, both overseas and in the United States to find out where this person is, but I think the experts all agree there is someone who did train these two individuals.