LEADERS' STRIDE U.S. Marine Corps Lt. Gen. John R. Allen, U.S. Army Gen. David H. Petraeus, outgoing commander of the International Security Assistance Force, and U.S. Navy Adm. Mike Mullen, chairman of the Joint Chiefs of Staff , arrive at ISAF headquarters in Kabul, Afghanistan, for Allen's promotion ceremony, July 18, 2011. Allen is succeeding Petraeus, who has been confirmed as the new CIA director. SHARE: Download: Full Size (0.08 MB) Credit: VIRIN: 803965-P-QQF60-813.jpg Photo Gallery