ANTALYA, TURKEY - NOVEMBER 15: (L to R)Turkish President Recep Tayyip Erdogan meets Russian President, Vladimir Putin on day one of the G20 Turkey Leaders Summit on November 15, 2015 in Antalya, Turkey. World leaders will use the summit to discuss issues including, climate change, the global economy, the refugee crisis and terrorism. (Photo by Dmitry Azarov/Kommersant Photo via Getty Images)