Russian S-400 Triumph/SA-21 Growler medium-range and long-range surface-to-air missile systems drive during the Victory Day parade at Red Square in Moscow, Russia, May 9, 2015.ReutersUkraine said its forces took out multiple S-400 launchers during an attack on a Russian base.The strikes on the Dzhankoi base in Crimea this week destroyed or damaged four launchers, Kyiv said.The S-400 is a prized Russian air-defense system, and relatively few have been lost during the war.