Visitors check out the Soviet-era metro cars exhibited at the Partizanskaya subway station in Moscow, as part of festivities marking the subway system's 80th anniversary. Pavel Golovkin/AP hide caption

itoggle caption Pavel Golovkin/AP

A column of Russia's T-90 tanks rumbles over the cobblestones in Moscow's Red Square on May 9 during the country's Victory Day parade celebrating the anniversary of its costly victory over Nazi Germany in World War II. Yuri Kadobnov/AFP/Getty Images hide caption

itoggle caption Yuri Kadobnov/AFP/Getty Images