The Air Force and Navy have determined that each will require more Mine Resistant Ambush Protected vehicles than previously thought, adding new momentum to the Marine Corps and Army effort to rapidly field a new vehicle fleet to Iraq and Afghanistan that is optimized to protect personnel against roadside bombs. The total U.S. military requirement for MRAP -- a stopgap for a humvee replacement -- has surged 15 percent larger this month and is expected to grow as military commanders...