S-400 has been deployed to Crimea

Russia has deployed it S-400 air defense system to Crimea peninsula, a source told RIA Novosti. Earlier, it was reported that the unit will only arrive next month.

ЗРК С-400 Триумф (SA-21) на репетиции 4 мая 2010
By ru:Участник:Goodvint (Own work) [GFDL or CC BY-SA 3.0], via Wikimedia Commons