tonight an interview with a survivor of the deepwater horizon. his name is tyrone benton. he may have been the first person to see signs of a warning. his job was critical, to send down cameras and inspect the well, the rig, the blow-out preventer, checking for anything unusual. weeks before the explosion, he says he found it, a cloud in the water. it was a leak, he says. he talked to special investigations unit drew griffin about what he says he saw and what happened after the discovery was made. >> tyrone benton may well have seen the first signs that something was very, very wrong on the deepwater horizon. >> did you ever get close enough to the leak to see what exactly was leaking? >> yes. we flew down to the pod and saw that there was an angular fitting that had a leak on it.