© Reuters. FILE PHOTO: Iskander-M missile launchers drive during a rehearsal for the Victory Day parade, which marks the anniversary of the victory over Nazi Germany in World War Two, in Red Square in central Moscow, Russia May 7, 2021. REUTERS/Maxim Shemetov (Reuters) - The Iskander tactical missile systems and the S-400 air defence systems that Russia has deployed to Belarus are fully prepared to perform their intended tasks, a senior Belarusian defence ministry official said on Sunday. "Our servicemen, crews have fully completed their training in the joint combat training centres of the armed forces of the Russian Federation...