Mr. Kim’s presence at a Chinese military parade was a sign of his growing geopolitical ​leverage and that North Korea was being accepted as a de facto nuclear power.

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Britain, France and Germany said the country had violated the terms of a 2015 nuclear deal. Iran’s foreign minister called their action “illegal.”

© Elisabeth Mandl/Reuters

Iran halted cooperation with the agency last month, as experts warned that Tehran might revive efforts to build a nuclear bomb.

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