Armenian people gather around a chasm in the mountain during a commemoration ceremony at a site called 'Dudan' near Diyarbakir, and believed to be a mass grave of the Armenian Genocide, on April 22, 2015. Armenians prepare to commemorate a hundred years since a genocide wiped out up to 1.5 million of their kin as a fierce dispute still rages with Turkey over one of the greatest crimes of the 20th century. AFP PHOTO / ILYAS AKENGIN        (Photo credit should read ILYAS AKENGIN/AFP/Getty Images)