The Pentagon acquisition czar is moving to assert oversight of a fast-moving and potentially big-ticket Army and Marine Corps effort to field thousands of armored vehicles that promise improved protection against roadside bombs. Kenneth Krieg, the under secretary of defense for acquisition, technology and logistics, has directed the Navy -- in cooperation with the Army -- to prepare by March 15 a proposal for how the Mine Resistant Ambush Protected vehicle will meet the statutory requirements of a major defense...