TOPSHOT - Russian President Vladimir Putin pays his respects to slain Russian Ambassador to Turkey Andrei Karlov, during the funeral ceremony at the Russian Foreign Ministry in Moscow on December 22, 2016. - Russian President Vladimir Putin on December 22 bade farewell to Andrei Karlov at a packed memorial ceremony in Moscow for the diplomat who was assassinated in Turkey by an off-duty policeman. (Photo by Alexey NIKOLSKY / Sputnik / AFP)        (Photo credit should read ALEXEY NIKOLSKY/AFP/Getty Images)