ANAHEIM, Calif. (AP) -- A locomotive broke loose on Disneyland's Big Thunder Mountain Railroad roller coaster Friday, killing a man and injuring 10 other people, officials said. TV helicopters showed a triage unit set up near the ride and one person being taken on a stretcher to an ambulance. The roller coaster takes amusement park visitors on a twisting, turning ride aboard what is supposed to be a runaway train in the Old West. Riders zoom through mineshafts and caverns, past falling rocks and tumbling waterfalls. The ride opened in 1979, making it one of newer roller coasters at Disneyland....