Watch: Near collision at San Francisco airport

Federal safety officials blame two Air Canada pilots for coming within 10 to 20 feet of crashing their jetliner into a plane on the ground last year in San Francisco. The Air Canada pilots were apparently confused because one of two parallel runways was closed and dark before the late-night incident. The crew was seconds from landing their Airbus A320 jet on a taxiway where other planes loaded with passengers were waiting to take off. Underscoring the severity of the incident, the NTSB's top aviation-safety staffer, John DeLisi, said at a hearing in Washington that it was the first time the board considered a major investigation for an event in which there were no injuries or damaged planes.