file yur. even whether there are witnesses, there can be mystery and con tro verse sichlt upwards of 1500 people say they saw some kind of fire trail in the sky, leading to speculation it was a missile and terrorism that brought down the 747 killing 243 people. pierre salinger, fed the conspiracy incorrectly claiming it was a u.s. navy ship that shot the plane down. it was painstaking work by investigators that concluded an explosion in the fuel tank was the real mystery. in some mysteries, it is not how passengers survived such was the case of flight 571. in 1972, the charter plane crashed in the an december mountains. of the 45 passengers on board, only 16 would live to tell it. it was made famous in the 1993 film "alive" depicting survivors eating the dead to stay alive