A man holds a symbolic vote ballot and a mark ballot paper showing two 'my choice' (Tercih) stamps in the 'No' (Hayir) leaving the 'Yes' (Evet) section blank, as members of Turkey's main opposition party, the Republican People's Party (CHP), gather at the Caglayan courthourse to submit their petition to object alleged irregularities in Turkish vote 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 / OZAN KOSE        (Photo credit should read OZAN KOSE/AFP/Getty Images)