EVIAN-LES-BAINS, June 15 -- World leaders are gathering in France for the G7 summit as US President Donald Trump arrives following a major diplomatic breakthrough with Iran that is expected to reshape discussions on global security and energy.

The summit, hosted by French President Emmanuel Macron, brings together the G7 nations - France, the United States, Canada, Germany, Italy, Japan and the United Kingdom - at a time of heightened geopolitical tension. Key topics on the agenda include the Iran conflict, the war in Ukraine, global trade disputes, artificial intelligence regulation and energy security.

Hours before departing Washington, Trump announced a deal aimed at ending the US-Iran conflict, including a ceasefire and steps toward...