Our open southern border is a threat to U.S. national security. This fiscal year, there were more than 150 people apprehended by Customs and Border Protection that were on the FBI’s terrorist watchlist. Today, I told Bill Hemmer and Dana Perino on America's Newsroom that the United States is facing its greatest threat of a terrorist attack in nearly a decade. #Fox #FoxNews #AmericasNewsroom #BillHemmer #DanaPerino