The Pentagon is considering trimming the Navy's planned fleet of 11 aircraft carriers to 10 in order to find money for new military capabilities needed to better contend with irregular, catastrophic and disruptive challenges, according to Pentagon sources and documents. A classified study, prepared by the Joint Staff and the Office of the Secretary of Defense in preparation for the Quadrennial Defense Review, has determined that an aircraft carrier strike group that arrives at the tail end of a major...