Army Sergeant Bowe Bergdahl, was freed in a prisoner swap after nearly five years in captivity with the Taliban. For the first time, Bergdahl's friend is now speaking out, saying he believes Bergdahl walked away from his post in Afghanistan in 2009.
It's been four months since Bergdahl was freed and now CNN is learning new details about what he's doing and why he hasn't spoken to his own parents for so long.
CNN's Ed Lavandera has this exclusive OutFront investigation.
At least one other American remains in the hands of ISIS.
In the video of ISIS beheading American journalist James Foley, the terror group showed American journalist Steven Sotloff, and threatened to kill him too if the United States doesn't stop airstrikes in Iraq.
David Rohde is another American who was held by a terror group.
He was a reporter for the New York Times when the Taliban took him hostage for more than seven months in 2008.
Rohde escaped thanks to the help of a local journalist.
A new picture of Army Sergeant Bowe Bergdahl during his captivity posing with a Taliban leader has surfaced. The undated photo was posted on a pro-Taliban Twitter account.
Bergdahl is seen smiling with a top leader from the Haqqani network who was killed in a U.S. drone strike in August of 2012. CNN cannot confirm the context of the photo or whether his smile was natural or coerced.
After five years of captivity, Bergdahl returned to the U.S. nearly a month ago. Military sources tell CNN his reintegration process is almost complete.
To help us digger deeper, Roy Hallums, an American contractor who was kidnapped in Iraq in 2004 and spent 311 days in captivity.
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.
In exchange for Sgt. Bowe Bergdahl, the U.S. government released 5 Taliban leaders from the Guantanamo Bay detention camp.
Those 5 men are now living in Doha, Qatar and are under supervision of the Qatari government.
Erin Burnett traveled to Qatar and asked locals what they think about have Taliban members living in their city.
In her exclusive report, she visits the Taliban's "office" in Doha to find out what's really going on.