Source Code - Movie Ending Analysis (SPOILER)

Christy Lemire (AP critic and host of Ebert Presents at the Movies, check your local PBS listings), Matt Atchity (editor-in-chief of Rottentomatoes.com) and Ben Mankiewicz (host of Turner Classic Movies) discuss the ending of Source Code starring Jake Gyllenhaal, Michelle Monaghan, Vera Farmiga and Jeffrey Wright. See what the other critics are saying: http://www.rottentomatoes.com/m/source_code/ Colter Stevens, a US Army helicopter pilot whose last memory is flying in Afghanistan, wakes up on a commuter train. However, he discovers that he has assumed the identity of another man. 8 minutes later, the train explodes and Stevens finds himself in some kind of pod. He then talks to someone named Goodwin, who tells him he has to go back and find out who the bomber is. He is sent back to go through the whole thing again and attempts to find who the bomber is but fails. The bomb goes off and Stevens finds himself in the pod again. He is sent back another time, yet still cannot find out any