HIROSHIMA, JAPAN – MAY 26: Vehicles travel through downtown near Hondori on May 26, 2016 in Hiroshima, Japan. On May 27, President Barack Obama is scheduled to visit Hiroshima, which will be the first time a U.S. president makes an official visit to the site where an atomic bomb was dropped at the end of World War II. (Photo by Jean Chung/Getty Images)