Photos of the day - April 23, 2015

Demonstrators hold candles and pictures of Armenian victims during a commemoration for the victims of mass killings of Armenians by Ottoman Turks, in Istanbul, Turkey, the Calbuco volcano erupts near Puerto Varas, Chile, and Iraqi security forces and tribal fighters walk down a street after regaining control of the northern neighborhoods, following overnight heavy clashes with Islamic State group militants, in Ramadi, Iraq are some of the photos of the day.

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