ISIS Holiday Horror, 'Christmas Blood' Attack Warnings Must Be Taken Seriously: Security ExpertBy Stoyan Zaimov, Christian Post Reporter CommentPolice work at the site of an accident at a Christmas market on Breitscheidplatz square near the fashionable Kurfuerstendamm avenue in the west of Berlin, Germany, December 19, 2016. | (Photo: Reuters/Fabrizio Bensch)Follow Stoyan Zaimov on Facebook: CPSZaimov