Tusk Sees Threat to Borderless Travel as Slovenia Eyes Fence

``Warnings of an end to visa-free travel intensified in the European Union as Slovenia said it may join Hungary in fencing off its borders if the bloc fails to help countries on its southeastern fringe. Slovene Foreign Minister Karl Erjavec said the Adriatic nation will "adopt all measures" to ensure the safety of its citizens and migrants if the situation worsens and the accord reached Sunday in Brussels isn't implemented,''