German President Joachim Gauck makes a speech during an Ecumenical service marking the 100th anniversary of the mass killings of 1.5 million Armenians by Ottoman Turkish forces, at the cathedral in Berlin April 23, 2015. Gauck on Thursday condemned the massacre of 1.5 million Armenians by Ottoman Turkish forces a century ago as "genocide", a term that the Berlin government had long rejected. [Photo/Agencies]