LONDON, Dec. 4, 2019 (Xinhua) -- NATO (North Atlantic Treaty Organisation) leaders pose for a group photo at the NATO Summit in London, Britain, on Dec. 4, 2019.

LONDON, Dec. 5, 2019 (Xinhua) -- NATO (North Atlantic Treaty Organisation) leaders are seen after a group photo at NATO Summit in London, Britain on Dec. 4, 2019.