Putin vows Russian retaliation over US missile shield in Europe
Some elements of the US missile shield, which Putin said was a direct threat to Russia's security, are being installed in Poland, and some in Romania.
May 28, 2016, 03:27 AM ISTUS missile shield in Romania goes live to Russian fury
Relations between NATO and Moscow have sharply deteriorated since Russia annexed Crimea from Ukraine in March 2014, sparking fears among other eastern European countries that they too could be the targets of Russian aggression.
May 13, 2016, 03:06 AM IST