Nearly 25 years since the Sept. 11, 2001, terror attacks, President Trump honors 9/11 first responders and officials at the White House, where a steel beam recovered from the original World Trade Center that was attacked is on display.

Canada’s tariffs on American goods, ranging from seafood to furniture and worth $20 billion, went into effect just after midnight on Tuesday as Canadian Prime Minister Mark Carney sought to counter Trump’s tariffs on Canada following after trade talks collapsed last month.

Canadian Finance Minister François-Philippe Champagne announced the tariffs on Aug. 25, following the collapse of trade talks between Washington and Ottawa on Aug. 21.

Trump immediately imposed tariffs on $20 billion of Canadian exports to the United States beginning on Aug. 22.