Russian air force jets fly in formation during a rehearsal for the Victory Day parade above central Moscow

Russian air force jets fly in formation during a rehearsal for the Victory Day parade above central Moscow

Russian air force jets fly in formation during a rehearsal for the Victory Day parade above central Moscow, Russia, May 7, 2015. Russia will celebrate the 70th anniversary of the victory over Nazi Germany in World War Two on May 9. REUTERS/Grigory Dukor