On Friday, U.S. Navy Admiral Mike Mullen stepped down as chairman of the Joint Chiefs of Staff. What were Mullen’s most important moments in prosecuting the war on terror? What was his major contribution? How was his approach to the job much more political than any of his predecessors? Why will he be best remembered for his impact on the culture of the military? Why does retired U.S. Army Lt. Col. Bob Maginnis say Mullen failed our troops? Why was his handling of “Don’t Ask Don’t Tell” burdensome for commanders and troops? And what does Col. Maginnis expect from Mullen’s successor, U.S. Army Gen. Martin Dempsey?