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QUEBEC CITY, June 8-- The Group of Seven (G7) summit, which kicked off here 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. The leaders of the G7, the world's most powerful industrialized countries including Canada, France, Germany, Italy, Britain, Japan and the United States, meet every year to discuss collaboration on issues like world economy, climate change, security and peace. | 
