off long island represents 25 years of grief. this is where flight 800 plunged into the atlantic ocean, july 17th, 1996. killing his niece, michelle becker. you could never really close the door on this. you could never really put it away. reporter: becker was one of 230 people who are memorialized here. a missile was suspected as cause of the crash to investigators began a reconstruction of parts pulled from the ocean floor. peter goals was then the managing director of the national transportation safety board. when you talk about airplane breakup and was it a bomb, was it a missile, well you could see the evidence. reporter: the massive reconstruction remains hidden from public view in a secluded hanger in virginia used for years as an agency teaching aid, we were looking at the wreckage.
suspected as causes of the crash, so investigators began unprecedented reconstruction of parts pulled from the ocean floor. peter was the managing director of the national transportation safety board. when you talk about airplane breakup, when you talk about, well, was it a bomb? was it a missile? well, you can see the evidence. reporter: the massive reconstruction remains hidden from public view in a secluded ntsb hanger in virginia. used for years as an agency teaching aid, we were granted a last look at the nearly 100-foot section of wreckage. the ntsb is moving out of this building, meaning all 6,000 pieces will be disassembled forever. we followed the facts. reporter: frank was on the original team of flight 080 investigators, who used this reconstruction to determine a rogue electrical short near the center wing fuel tank brought the plane down. it s been very useful, but i think we ve got on the the point that it s time to move on from that but in a different way. rep