Photo taken on June 8, 2018 shows the 44th G7 summit media center at the Convention Center of Quebec City, Quebec of Canada. The Group of Seven (G7) summit, which kicked off in Charlevoix of Canada's Quebec on Friday, is expected to be a tough meeting between the United States and its allies amid raising concerns over U.S. tariffs on steel and aluminum imports. (Xinhua/Li Baodong)