Assassination of Russian envoy to Turkey

ANKARA, TURKEY - DECEMBER 22: Turkish Prime Minister Binali Yildirim lays flowers to pay tribute Russian Ambassador to Turkey Andrei Karlov at the Russian Embassy in Ankara, Turkey on December 22, 2016. Russian Ambassador to Turkey Andrei Karlov has been shot multiple times at an exhibition in Ankara and died, on December 19, 2016. Karlov was delivering a speech at the opening ceremony of a photo exhibit when an armed assailant 22-year-old riot police officer Mevlut Mert Altintas opened fire on him. Assailant has been killed by the Turkish police during a fire exchange at the crime scene. (Photo by Turkish Prime Ministry / Mustafa Aktas/Anadolu Agency/Getty Images)