Asiana Flight 214: Did plane's autothrottle cause the crash?
Asiana Flight 214 was flying too slow when it crashed in San Francisco. The National Transportation Safety Board says it all centers around the plane's "autothrottle" system, roughly equivalent to a car's "cruise control." If you think it's on, and it's not, you'll slow down and stall. And that might have been what happened in this crash. John Blackstone reports.