[1/5] Russian service members march in columns before a rehearsal for a military parade, which marks the anniversary of the victory over Nazi Germany in World War Two, in Moscow, Russia May 7, 2023. REUTERS/Maxim Shemetov May 7 (Reuters) - Russia stages its annual Victory Day parade on Red Square on Tuesday amid particularly tight security after a series of drone attacks, including on the Kremlin citadel, symbolic heart of the Russian state, that Moscow has blamed on Ukraine. Victory Day is a key anniversary for President Vladimir Putin, who often evokes the spirit and sacrifice that helped the Soviet...