The new Gordie Howe International Bridge between Michigan and Ontario is about to open, but Donald Trump's latest tariffs on Canada have muted celebrations.

It was supposed to be a celebration marking the opening of a new international bridge connecting Detroit, Michigan and Windsor, Ontario, after eight years of construction and several delays. Canadian and American dignitaries planned to come together for the inauguration of the C$6.4bn ($4.5bn; £3.4bn) Gordie Howe International Bridge connecting the automotive hubs of each nation. Instead, Canadians will host their own event solo on Friday, having disinvited their US counterparts in the wake of Donald Trump's latest tariff threat on their country. It's only the most recent bit of drama for a bridge meant to symbolise unity between the long-time allies and trading partners, named after a legendary Canadian ice hockey player who played the majority of his career for the Detroit Red Wings. Now, it has come to reflect the fraught relationship between the two North American neighbours - and the pressure building on Prime Minister Mark Carney to navigate those choppy waters. Almost 15 years ago, Canada agreed to fully pay for the bridge's construction to bypass US political resistance and get the project, seen as necessary infrastructure to fix a trade bottleneck, moving. The bridge will help support more than C$1bn ($710m; £530m) worth of goods that pass through Windsor-Detroit crossing each day. When Canada first took on the construction project, which will be owned by both Ottawa and Michigan, it agreed to share toll revenue with the US state only once its costs were paid.