tom over the years a number of times. he first contacted us back in 2006 to argue about that documentary. as i recall, it was a disappearing blip. that disappearing blip could have been -- stalcupbeen asking the ntsb to reopen this investigation as far back as 2002. one radar return seems to show a piece of wreckage flying away from the pilot twice the speed of sound. that, he thinks, may be a piece of a missile. the ntsb thinks it was merely an anomaly on the radar. >> so, then, there are dozens of people, though, eyewitnesses, who said they saw something streaking toward this plane before this explosion. how do you explain that? >> actually, a number of them saw a red streak going across the sky. and it's still unexplained. what it may be and what the ntsb thinks it was was when the plane fell apart, the cockpit and first class separated from the rest of the airplane. the rest of the airplane kept flying. then it plunged, too. as it plunged the fuel in the wing exploded. a large explosion burning, plunging. that's what the ntsb thinks the witnesses may have seen. there was one really good witness who had a front closeup view. here's his account with david mattingly. i'm sorry