US soldier Bowe Bergdahl, who walked away from his army unit in 2009 and was held for five years by the Taleban, is the subject of the newly released second season of popular podcast Serial.
Bergdahl opens up for the first time about the time he spent as a prisoner in Afghanistan.
"Suddenly, it really starts to sink in that I really did something bad. Or, not bad, but I really did something serious," Bergdahl says in the podcast, which was released on Thursday.
Bergdahl, now 29 years old, wandered from his army unit and was taken prisoner by the Taleban.
In 2014, he was released in a controversial prisoner exchange that freed five Guantanamo Bay detainees.