President Bush has authorized the Marine Corps to involuntarily activate thousands of Marines to address a shortage of volunteers for missions in Iraq, Afghanistan and elsewhere. Up to 2,500 of these Marines may be activated at any one time from a pool of roughly 35,000 troops. The Individual Ready Reserve Marines called back to active duty will serve in active units and activated Reserve units to address joint requirements, mainly in the U.S. Central Command area of responsibility, Col. Guy...