( CNN ) -- 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 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 .