HAILEY — In 2011, during his long five-year vigil, waiting helplessly at home while his son was held by Taliban extremists half a world away, Bob Bergdahl made a personal video for the Pakistani government that he hoped would be delivered to his boy, Army Sgt. Bowe Bergdahl. “These are my thoughts. I can remain silent no longer,” the father began. He stood in a black shirt, his bushy blond beard worn long, the kind sported by most militant men in the war-racked region. In the three-minute video, he mentioned several high-ranking Pakistani generals by name, thanking them for their...