U.S. President Joe Biden vowed to strive toward a world free of nuclear weapons in a message he left on a visit to a Hiroshima museum documenting the devastation caused by a U.S. atomic bomb in 1945, the Japanese government said Saturday."May the stories of this Museum remind us all of our obligations to build a future of peace," Biden wrote in the guest book of the Hiroshima Peace Memorial Museum, which he visited with other Group of Seven leaders at the start of the three-day summit in western Japan on Friday."Together let us continue to make progress toward the day when we can finally an…READ FULL ARTICLE