Ukraine and China Will Dominate G7 Summit, But a New Threat Lurks: A.I.

President Biden began his foreshortened Asia trip on Thursday in Hiroshima, a city that devotes itself to reminding the world of what happens when a brutal war escalates into a nuclear one. There he prepared for discussions with his closest allies on two crucial issues: how to better arm Ukraine as it enters its counteroffensive against the Russian invaders, and how to slow, or halt, the downward spiral in relations with China.