Jet Car Crash That Killed Jessi Combs Under Investigation

Co-host Jessi Combs speaks at the 'Overhaulin' discussion panel during the Discovery Networks/Velocity portion of the 2012 Summer Television Critics Association tour at the Beverly Hilton Hotel in Los Angeles, California on Aug. 2, 2012. Photo by Frederick M. Brown/Getty Images

An investigation has been launched into the jet car crash that killed Jessi Combs, one of the most famous women racers in the world.

Combs, 39, died in the Alvord Desert in Oregon while trying to break a land speed record. She was once clocked at 483 miles per hour; the record is 512.7 mph.