At least one person was killed and another 32 were injured Thursday in a Megabus crash in Illinois. The double-decker bus, traveling from Chicago to St. Louis, was on Interstate 55 about 60 miles north of St. Louis when the driver lost control because of a flat tire, according to law enforcement officials. Megabus said there were 81 passengers booked, but 64 onboard. Police said "several" of the injuries were critical, and Illinois State Trooper Doug Francis said 10 helicopters and 30 ambulances responded to the wreck. Stretches of I-55 had to be shut down in both directions.