(Reuters) – A U.S. military investigation of Army Sergeant Bowe Bergdahl’s capture by the Taliban found he had slipped away from his unit before but had always returned, raising questions about whether or not he was deserting when he disappeared in 2009, people familiar with the findings said on Thursday. Bergdahl, 28, was freed after five years as an Afghanistan war prisoner on Saturday when the Obama administration agreed to release five Taliban leaders from Guantanamo prison […]