Prime Minister Mark Carney became the first Canadian leader to visit Saudi Arabia in 26 years on Thursday, sitting down with Crown Prince Mohammed bin Salman in Jeddah as part of a pragmatic reset after years of diplomatic estrangement. The visit unfolded while U.S.-Iran fighting flared across the Gulf, with Canada condemning Iranian attacks on Gulf shipping and reaffirming support for regional security.

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• 13 new commercial agreements were...