Turkey is weighing contingency plans along its border if the United States attacks neighboring Iran, a senior official told Agence France-Presse on Thursday. “If the United States attacks Iran and the regime falls, Turkey is planning additional measures to reinforce border security,” said the official, who requested anonymity. NATO member Turkey, which shares a 530-kilometre (330-mile) border with Iran, has often expressed opposition to military operations targeting the Islamic Republic. Part of their joint frontier is secured by a wall stretching 380 kilometers but “it has proven insufficient,” the official told AFP. At this stage, Turkish officials are avoiding the use of the term “buffer zone.”Among the plans are “to increase the deployment of technological border security systems and boost troop numbers,” the official said.