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Search crews to the wreckage five days after it went down. the debris field was relatively contained. that shows it broke up when it hit the water before it sank 2 1/2 miles to the ocean floor. in 1996, twa flight 800 exploded in the sky near new york. debris scattered far and wide. investigators had to map out several debris fields. the cockpit sank, but the fuselage and wings scattered far because of how high up the plane was when it exploded. >> initial pieces of floating debris just give you...

Structure, could be found floating six days if the aircraft struck the water. >> reporter: air france flight 447 crashed into the atlantic ocean in 2009. in this case, floating debris led search crews to the wreckage five days after it went down. the debris field was relatively contained. that shows it broke up when it hit the water before it sank 2 1/2 miles to the ocean floor. in 1996, twa flight 800 exploded in the sky near new york. debris scattered far and wide. investigators had to map out...

Fuselage and wings scattered far because of how high up the plane was when it exploded. >> the initial pieces of floating debris just give you a clue where to start looking and listening for the pingers, the transmitting devices that make a ping sound that a sonar picks up that are on the recorders. >> reporter: in the case of the 1996 hijacked ethiopian plane when the pilot tried ditching the aircraft in shallow waters, it broke into three segments with the fuselage floating and the rear sectio...