Servicemen of the Ukrainian National Guard talk with people wearing bear costumes as they patrol in the center of Kiev on November 30, 2018, after martial law was imposed in border regions. - Tensions between Ukraine and Russia rose on November 25, when Russian forces seized three Ukranian navy vessels and their crew. Ukraine imposed martial law for 30 days in 10 regions that border Russia, the Black Sea and the Azov Sea on November 28. (Photo by Sergei SUPINSKY / AFP)