Six of the Group of Seven leaders are trying on the final day of their Tuesday to show the wealthy nations’ club still has the clout to shape world events despite the early departure of Donald Trump.

Prime Minister Mark Carney and his counterparts from the U.K., France, Germany, Italy and Japan will be joined by Ukrainian President Volodymyr Zelenskyy and NATO chief Mark Rutte to discuss Russia’s relentless war on its neighbor.

World leaders had gathered in Canada with the specific goal of helping to defuse a series of pressure points, only to be disrupted by a showdown over Iran’s nuclear program that could escalate in dangerous and uncontrollable ways. Israel launched an aerial bombardment campaign against Iran on Friday, and Iran has hit back with missiles and drones.

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