Thirteen months after millionaire thrill-seeker Steve Fossett mysteriously disappeared, authorities finally know what happened to his small single-engine plane: It slammed straight into a mountain on a cloudy day.

DNA experts are preparing to test what are believed to be the remains of millionaire adventurer Steve Fossett, found in the wreckage of his plane.

A hiker has found items possibly belonging to missing adventurer Steve Fossett, US authorities said today.