NATO-Russian ties are tense amid Ukraine crisis and recent military encounters in the Baltic Sea
NATO doesn't have a goal to provoke Russia.
The White House spokesman Josh Earnest claims the alliance wants to cooperate with the Kremlin. But Moscow's involvement in Ukrainian conflict creates a rift in their relations.
Ukraine is not a part of NATO, but it shares common borders with its members. Earnest says the alliance is worried about the situation in its neighbouring state.