flown for four or five hours after losing contact with the ground. at the site of its last contact with the ground, it then changed direction. that s where you re getting the pointing arrow. off-base from its scheduled route into the indian ocean. is it possible that this plane may never be found? it has happened dozens of times over the years. kyung lah is outfront. reporter: look back through aviation history, and there are other mysteries that linger for months, years, even decades. there have been planes that disappeared. carroll gray is an air flight