CANNON SHELL Russian Navy Capt. Andrey Lyalin, director of the Central Naval Museum, center, presents U.S. Defense Secretary Robert M. Gates, right, with the 122mm shell after Gates fired the "Noon Cannon" during his tour of the Peter and Paul Fortress in St. Petersburg, Russia, March 21, 2011. SHARE: Download: Full Size (0.06 MB) Credit: VIRIN: 463515-M-JHL97-172.jpg Photo Gallery