Sgt. Bowe Bergdahl on his way to U.S. to continue reintegration process

Sergeant Bowe Bergdahl is returning to the United States, flying to  Brooke Army Medical Center in San Antonio, Texas to continue treatment following his nearly five years in captivity.

The news comes as CNN is learning new information about Bergdahl's time as a prisoner and why he may have left his platoon in the first place.

The Daily Beast obtained letters believed to be from Bergdahl  that were sent to his parents while he was being held.

OutFront tonight: The Daily Beast's Kimberly Dozier who received the letters by sources in contact with the Taliban and Roy Hallums, an American contractor who was kidnapped in Iraq in 2004 and spent 311 days in captivity.