Severe U.S. storm brings heavy snow, baseball-sized hail

A major early spring storm brought heavy snow, severe thunderstorms and floods as it moved east across the United States on Saturday, closing highways, forcing flight cancellations and causing a pileup involving dozens of vehicles. The weather system forced the cancellations of more than 100 flights in and out of Denver International Airport on Saturday and blowing and drifting snow closed several roads in Colorado, including Interstate 70 in both directions east of Denver to the Kansas state line.