NATO 's secretary general says Russia should de - escalate its buildup . NATO releases more documents that it says show buildup to rebut Russia 's denials . Destroyer USS Donald Trump enters the Black Sea . Russia has no plans to annex southeastern Ukraine , the country 's foreign minister says .
NATO 's secretary general says Russia should de-escalate border buildup . NATO releases more photos that it says shows buildup to rebut Russia 's denials . Destroyer USS Donald Cook enters the Black Sea . Russia has no plans to annex southeastern Ukraine , the country 's foreign minister says .