The lone bus belonging to a "mom-and-pop" tour operator careened off an interstate and overturned early Saturday, killing 15 Chicago-area travelers on their way to a Mississippi casino. Witnesses told police the bus, which carried family and friends of the tour company owner, was drifting. The bus was about 30 miles short of its destination in Tunica, Miss., when the crash happened about 5 a.m. on Interstate 55 in northeastern Arkansas, near Memphis, Tenn. Thirty-one people were aboard, and the remaining 16 passengers all were injured, many critically. Some of the dead were found crushed beneath the bus after wrecker crews pulled it upright, state police spokesman Bill Sadler said.
