Ukrainian officials say they have struck several barracks housing Russian soldiers in recent days. The Kremlin admitted that a single Ukrainian strike killed at least 89 troops in a New Year’s Day attack in Makiivka, in eastern Ukraine. Russia now says it will impose a temporary ceasefire over Orthodox Christmas, beginning Jan. 6. Russia scholar Mark Galeotti talks with The World’s Carol Hills about the political cost the Kremlin might pay for the high number of casualties.