Investigators worked in freezing temperatures at a charred, high-mountain crash site to recover victims' remains and find clues Saturday in the crash of a plane that slammed into a mountain with 46 people aboard. Sixteen specialists, including crash investigators and forensic experts, were dropped off by helicopter near the crash site on the steep, foggy slope at an altitude of 13,500 feet. The twin-engine Santa Barbara Airlines plane shattered on impact and burst into flames Thursday, leaving only its tail largely intact and a swath of blackened ground amid scrub brush. Searchers spotted the crash site by helicopter on Friday.