TOPSHOT - Supporters of the "No" march at Besiktas to submit their petition calling for the annulment of a referendum that approved sweeping constitutional changes boosting President Recep Tayyip Erdogan's powers, claiming blatant vote-rigging had swung the result, on April 18, 2017 in Istanbul. Turkey's opposition on April 17, 2017 called for the annulment of a referendum giving President Recep Tayyip Erdogan sweeping new powers, as international monitors voiced concern over the campaign and vote count. The referendum was seen as crucial not just for shaping the political system of Turkey but also the future strategic direction of a nation that has been a NATO member since 1952 and an EU hopeful for half a century. / AFP PHOTO / BULENT KILIC (Photo credit should read BULENT KILIC/AFP/Getty Images)
