ISIS Terrorists Won't Sneak into U.S. Across Loose Mexico Border: Homeland Security Officials Despite social media chatter on Twitter, Obama administration officials are more concerned about passport-holding bloodthirsty ISIS jihadists entering the U.S. via airplane. WASHINGTON - Despite some Twitter chatter, there is no evidence ISIS terrorists are trying to slip into the United States from Mexico, Department of Homeland Security officials told Congress Wednesday. Administration officials said they are more concerned about jihadists entering the U.S. legally on commercial airline flights. Administration higher-ups testifying at a House hearing Wednesday threw cold water on scary border scenarios cited by conservatives...