U.S. Navy Adm. Mike Mullen, chairman of the Joint Chiefs of Staff, and Lt. Gen. Sher Mohammad Karimi, chief of the General Staff of the Afghan National Army, depart the Ministry of Defense in Kabul, Afghanistan, July 31, 2011. Mullen is on a five-day USO tour with comedian Jon Stewart, NBA legend Karl Malone and magician David Blaine visiting troops in Afghanistan and Iraq. U.S. Navy Adm. Mike Mullen, chairman of the Joint Chiefs of Staff, and Lt. Gen. Sher Mohammad Karimi, chief of the General Staff of the Afghan National Army, depart the Ministry of Defense in Kabul, Afghanistan, July 31, 2011. Mullen is on a five-day USO tour with comedian Jon Stewart, NBA legend Karl Malone and magician David Blaine visiting troops in Afghanistan and Iraq. SHARE: Download: Full Size (2.95 MB) Tags: Photo Essays Credit: VIRIN: 930093-V-JSA13-909.jpg Photo Gallery