Heading into an al fresco dinner Monday evening overlooking the azure Lake Geneva shoreline, the leaders of the world’s most powerful nations were hoping to gain clarity on what, exactly, President Donald Trump’s new arrangement with Iran entailed.

World leaders prepare for a fraught G7 summit with Trump in Evian, as tensions rise over Iran talks, NATO commitments, China trade and Ukraine’s changing dependence.

The Iran war has drawn the world's focus, but the G7 is also likely to address Russia's war against Ukraine, which continues to rage in eastern Europe.