What to know

• The Canadian government retaliated against President Donald Trump’s latest wave of tariffs by raising tariffs on steel products and imposing a swath of new duties on $20 billion in U.S. products exported to Canada. NBC News' Brian Cheung and Yamiche Alcindor r...S1
• Canada announces billion retaliatory tariffs on US goods as trade war escalatesS2
• The measures come after President Trump imposed 50% tariffs on many Canadian goods and threatened more after trade talks broke down on Friday.S3
• Hundreds of US goods will face increased levies after September 8S4
• Canada has said it will impose new tariffs on US imports as a trade war between the neighbours heats up.S5