PAKISTANI ARMY CHIEF U.S. Defense Secretary Robert M. Gates welcomes Pakistani Army Chief of Staff Gen. Ashfaq Kayani to his Pentagon office for security discussions, Oct. 20, 2010. U.S. Navy Adm. Mike Mullen, left, chairman of the Joint Chiefs of Staff, participated in the talks. SHARE: Download: Full Size (0.06 MB) Credit: VIRIN: 043394-E-DMG58-542.jpg Photo Gallery