Official: Someone in cockpit rerouted missing Malaysia Airlines Flight 370

A law enforcement official tells CNN that Malaysia Airlines Flight 370's route was re-programmed by someone inside the cockpit.

New evidence in Flight 370 search explains plane's path

But U.S. officials say an initial search of the pilot and co-pilot's personal computers and e-mail founding nothing to indicate they planned to change course.

CNN's Martin Savidge is in a triple seven simulator to demonstrate how easily a Boeing 777's flight path can be rerouted while in flight.