US President Barack Obama (C) hugs Shigeaki Mori, a survivor of the 1945 atomic bombing of Hiroshima, during a visit to the Hiroshima Peace Memorial Park on May 27, 2016.
Obama on May 27 paid moving tribute to victims of the world's first nuclear attack. / AFP / POOL / KIMIMASA MAYAMA        (Photo credit should read KIMIMASA MAYAMA/AFP/Getty Images)