(CNN) – A military plane carrying Army Sergeant Bowe Bergdahl, the last American prisoner of war, touched down in San Antonio Friday morning.
It's the last leg in a journey that took him from Taliban captivity to a San Antonio military hospital, where he'll start his transition back into society.
Bergdahl disappeared five years ago while serving in Afghanistan. He was freed last month in a controversial five-to-one prisoner swap with the Taliban.
"This exchange has encouraged our enemies, and increased the risk to our military and civilian personnel serving around the globe," House Speaker John Boehner said.
A military source, speaking on the condition of anonymity, told CNN an investigation determined that Bergdahl deliberately left his base in 2009. But the Army stopped short of calling him a deserter, since they don't yet know his intent.
"He's just out of 5 years of captivity, we're going to have a chance to talk to him, we're going to get a chance to find out what was in his head that day when he was taken captive," Pentagon Spokesman Rear Admiral John Kirby said.
A pair of letters from Bergdahl, obtained by The Daily Beast, suggests he was concerned about conditions and leadership at the base.
Former Navy Seal Chris Heben says if he did indeed abandon his post, it was the wrong decision.
"There's always some derision in the ranks, but certainly I think for him to walk away, I think he realizes in his heart of hearts that he was wrong," Heben said.
Doctors say it may take months for Bergdahl to recover physically. But his public rehabilitation could take longer.
Over the past few months, a team of dozens of experts at the San Antonio military hospital have rehearsed what they were going to do when Bergdahl returned.
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