HIROSHIMA, JAPAN - MAY 27 : U.S. President Barack Obama (R) lays a wreath at the cenotaph in Hiroshima Peace Memorial Park to respect to the families of victims, killed by an atomic bomb in Hiroshima, Japan on May 27, 2016. US President Barack Obama is the first American president, visiting Hiroshima after United States of America dropped Atomic bomb in Hiroshima on August 6, 1945. (Photo by Richard Atrero de Guzman/Anadolu Agency/Getty Images)
