Who are Japan's Nobel Peace Prize winners Nihon Hidankyo? 

FILE - Doves fly by the Atomic Bomb Dome during the ceremony to mark the 61st anniversary of the world's first atomic bombing at Hiroshima Peace Memorial Park in Hiroshima, western Japan, Aug, 6, 2006 (AP) FILE - In this 1945 file photo, an Allied war correspondent stands in the ruins of Hiroshima, Japan, just weeks after the city was leveled by an atomic bomb.

Japanese organization Nihon Hidankyo, a grassroots movement of atomic bomb survivors from Hiroshima and Nagasaki who are also known as Hibakusha, won the Nobel Peace Prize on Friday.