CBC’s Paula Duhatschek outlines how the oil and gas sector in Alberta might be impacted by the 10 per cent tariffs imposed by the United States. Alberta Premier Danielle Smith said Tuesday that U.S. tariffs are ‘an unjustifiable economic attack on Canadians and Albertans’ that represent a clear breach of the Canada-U.S.-Mexico free trade agreement. »»» Subscribe to CBC News to watch more videos: http://bit.ly/1RreYWS Connect with CBC News Online: For breaking news, video, audio and in-depth