Russia on Thursday, Nov. 29, deployed a new battalion of advanced S-400 surface-to-air missile systems in Crimea. The missile system is capable of hitting targets up to 30 kilometers high with speeds up to 2,700 kilometers per hour. The move comes days after Russian warships seized three Ukrainian vessels and their crews Sunday as they tried to make their way through the Kerch Strait to the Ukrainian port of Mariupol, in the Sea of Azov.
Ukrainian President Petro Poroshenko is asking NATO allies to send naval ships to the Sea of Azov to aid his country and "provide security" amid tensions with Russia.
