The Defense Department faces several "key" management challenges in implementing its plan to defend Europe against ballistic missile attack, according to a new Government Accountability Office report. "DOD has initiated multiple simultaneous efforts to implement [the European phased adaptive approach] but faces three key management challenges -- the lack of clear guidance, life-cycle cost estimates, and a fully integrated schedule -- which may result in inefficient planning and execution, limited oversight, and increased cost and performance risks," GAO states in...