History's Mysteries: Alaska's Bermuda Triangle part 1 of 5

In Alaska, people, planes and ships disappear--suddenly, inexplicably and permanently.
Of course, in an enormous territory with lots of difficult terrain and shifting weather, this is not entirely surprising. But the number of disappearances that remain totally unexplained is troubling, even taking into account the rugged nature of the state. ALASKA'S BERMUDA TRIANGLE investigates this phenomenon, focusing on one case in particular, the 1972 disappearance of a plane carrying two U.S. congressmen. Despite the largest search and rescue operation ever launched by the U.S. military, not a trace of the plane and its V.I.P. passengers was ever found!