Blimp catches fire and crashes near U.S. Open

A blimp caught fire and crashed to the ground near the U.S. Open golf tournament, injuring the pilot and causing an explosion on the ground.AirSign, an advertising firm, was operating the blimp. Patrick Walsh, the company's CEO, tells CBS News the cause of the fire is still under investigation.Jeff Alstadter, a spokesman for the U.S. Golf Association (USGA), said in a statement that the blimp crashed around 11:15 a.m. local time in an open field a half mile from the golf course.Twitter users pos