NATO Deputy Secretary General Rose Gottemoeller speaks during an international field exercise organised and conducted by NATO's Euro-Atlantic Disaster Response Coordination Centre (EADRCC) in Podgorica, Montenegro November 3, 2016. REUTERS/Stevo Vasiljevic

BUDAPEST (Reuters) - NATO hopes to welcome Montenegro as its new member at its meeting on May 25, Rose Gottemoeller, deputy secretary general of NATO, said at an event during a visit to Budapest on Wednesday.