Marina Davydova Karlova (2nd, L), the widow of slain Russian ambassador to Turkey, Andrei Karlov, and his mother Maria (1st L) attend Karlov's funeral inside the Christ the Saviour Cathedral in Moscow, Russia, Thursday, Dec. 22, 2016. Karlov was shot dead by a Turkish policeman Monday in Ankara, Turkey.(Xinhua/Bai Xueqi)
