ARLINGTON, VA - NOVEMBER 19: U.S. Defense Secretary Robert Gates (L) and Chairman of the Joint Chiefs of Staff Navy Admiral Michael Mullen take questions from reporters during news conference at the Pentagon November 19, 2009 in Arlington, Virginia. In the wake of the Ft. Hood attack, Gates announced that former Army Secretary Togo West and former chief of naval operations Adm. Vernon Clark will head the 45-day review of personnel programs, medical screenings and release and discharge policies, as well as the department's stateside security programs at bases and other facilities. (Photo by Chip Somodevilla/Getty Images)