Russian soldiers march during a welcoming ceremony for U.S. Defense Secretary Robert M. Gates at the Tomb of the Unknown Soldier in Moscow, March 22, 2011. Russian soldiers march during a welcoming ceremony for U.S. Defense Secretary Robert M. Gates at the Tomb of the Unknown Soldier in Moscow, March 22, 2011. SHARE: Download: Full Size (6.62 MB) Tags: Photo Essays Credit: VIRIN: 451849-P-TGR93-207.jpg Photo Gallery