CNN Anderson Cooper 360 April 26, 2013 05:17:00
Blackhawk helicopter landing. >> that's what it was all about. local police had no idea the fbi was coming. it was a surprise raid. very heavy handed. those two students are now being held by immigration service on a visa violation. it's odd that they're being held this long. we are being told that that's out of an abundance of caution. there's no connection between these fellas to what happened here on marathon day. they're still being held by their backgrounds. >> fascinating. i want to dig deeper now into the influences on the older and the younger suspect. how they may have become radica...