WASHINGTON (Sputnik) — Russia’s deployment of advanced S-400 air defense systems and Iskander missile complexes to Kaliningrad is destabilizing to European security, US Department of State spokesman John Kirby said in a briefing on Monday.
"While we understand that Russia has the right to exercise its conventional nuclear forces on its own territory, the deployment of Iskander and S-400 missiles to Kaliningrad is destabilizing to European security," Kirby stated.