CNN CNN Newsroom April 16, 2013 15:45:00
Immediately before those bombs went off, and what did he do immediately after that? he looked to see if the people around him were okay. he joins me right now here not more than two blocks from where the bombings happened. dr. shaw, tell me what that was like yesterday. >> i think initially myself and all the other runners weren't sure whether it was a firework gone bad or something that was supposed to happen. then after the second explosion went off, we knew something was wrong because all the spectators and fans started running away from us. we were just about to finish. so i -- my whole fa...