Residents wave Turkish national flags outside of the AKP party headquarters as they react to the outcome of the referendum in Istanbul, Turkey, on Sunday, April 16, 2017. With a declared victory, Turks approved the most radical constitutional overhaul since the republic was founded 93 year ago by giving President Recep Tayyip Erdogan authority to appoint ministers and top judges at his discretion and call elections at any time. Photographer: Kostas Tsironis/Bloomberg via Getty Images