7. TWA flight 800
Flight 800 exploded in the Atlantic Ocean near East Moriches, New York, on July 17, 1996, at about 8:31 PM.
230 people on board were killed.
The FBI found that the explosion happened due to a short circuit. But alternative theories also exist.
8. US Army Air Corps B-24D
An American bomber during World War Two, Lady Be Good went out on a mission over Naples, Italy, in April 1943 and never returned to its base in eastern Libya.
At the time it was assumed the plane had crashed in the Mediterranean and its nine-man crew was all designated 'missing in action'.
But the plane had in fact overflow its base because of technical issues and carried on for two hours, flying deep into North Africa.
Its crew eventually parachuted down to ground and the eight that survived the jump headed north, walking for nearly 100 miles (160 km) before succumbing to the heat and lack of water.
The plane was discovered 15 years later, when a British oil exploration team found the wreckage in the middle of the desert.
Incredibly, the bomber was remarkably intact and its machine-guns were still functioning.
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