BILL HEMMER, CNN ANCHOR: First, though, a closer look back, four years ago today.</s>BEGIN VIDEO CLIP, JULY 17, 1996) LINDEN SOLES, CNN ANCHOR: It is believed that a 747 aircraft has exploded in midair, about 20 miles south of New York's Long Island, into the Atlantic Ocean.</s>BRIAN JENKINS, FORMER CNN CORRESPONDENT: The plane was headed to Paris. It was one of TWA's main flights to Paris. And essentially the plane had exploded, broken in two and plunged into the Atlantic Ocean south of Long Island. It was just devastating to see the families coming in and wanting so badly to receive information about what had happened. And TWA was able to provide only so much information. And of course, the investigation went on for months and months, and the families had long since left, of course. But it was very frustrating for them. (</s>BEGIN VIDEO CLIP, JULY 17, 1996) SOLES: Federal investigators say they have no evidence of terrorism at this point and are treating the crash as an accident.</s>JENKINS: The most likely cause was an explosion in the center fuel tank which was essentially empty at the time of takeoff. There may have been a build-up of vapors and some kind of spark in the wiring of the plane that went through that center fuel tank, may have set off those gases and caused this huge explosion.
CNN 20: TWA Flight 800 Crash, July 17, 1996