As the Joint Improvised Explosive Device Defeat Organization adapts its mission to the challenges of Afghanistan, the organization is pushing back against a new Government Accountability Office report critical of its limited visibility over some of the military's counter-IED efforts. Lt. Gen. Thomas Metz, director of JIEDDO, told lawmakers today that the environment and enemy in Afghanistan "pose an altogether different challenge" from those of Iraq. Within the country, "local insurgents, tribal factions, and the Taliban enjoy a greater freedom...