The search for captured Sgt. Bowe Bergdahl, who was taken prisoner in Afghanistan three years ago,is continuing as defense leaders say the military and intelligence communities are doing everything possible to find him.

Army Gen. Martin Dempsey, chairman of the Joint Chiefs of Staff, says there is a poster of the 26-year-old Hailey, Idaho, soldier inside U.S. Central Command's operations center as a constant reminder that he is missing in action.

Bergdahl's parents went public this week with secret U.S. attempts to trade their son for Taliban prisoners in U.S. hands. They say they are frustrated by what they believe are stalled efforts to free him.

Officials believe Bergdahl is being held by the Haqqani network, insurgents affiliated with the Taliban, probably in Pakistan.