SIGNING HANDSHAKE U.S. Navy. Adm. Mike Mullen, chairman of the Joint Chiefs of Staff, congratulates Gen. Nikolai Makarov, chief of the General Staff of the Armed Forces of Russia, after signing a memorandum of understanding to continue combatting terrorism at the Central Navy Museum in St. Petersburg, Russia, May 6, 2011. Mullen is on a three-day trip to the country to meet with his counterparts. SHARE: Download: Full Size (0.06 MB) Credit: VIRIN: 744049-T-PRT55-945.jpg Photo Gallery