As NATO’s war against Libya nears its sixth-month anniversary, there’s one question that keeps churning over and over again in what passes for my mind: why can’t the most powerful military alliance in history topple a third-rate army? I discuss the topic with John Nagl of the Center for a New American Security, Paul Hughes, a retired Army officer with the U.S. Institute of Peace, and Andrew Exum, a former Army officer now as CNAS who oversees the Abu Muqawama blog.