President Obama will make a historic trip to Hiroshima, Japan, on May 27, becoming the first sitting U.S. president to visit the site of the world’s first atomic bombing. The White House formally announced the visit Tuesday after weeks of speculation that Obama would stop in the city after attending the Group of 7 economic summit in Ise-Shima. The president is expected to deliver a speech on nonproliferation of nuclear weapons. Japanese Prime Minister Shinzo Abe will join Obama on the visit, where the president will "highlight his continued commitment to pursuing the peace and security of a world without nuclear weapons," the White House said in a statement.