Interpretation of the news based on evidence, including data, as well as anticipating how events might unfold based on past events A U.S. Border Patrol agent walks along the border fence between Mexico and the United States near Calexico, Calif., on Feb. 8. If President Trump thinks walling out brown people across the Southwest border is an efficient way to make America great "again," he should read a new report by the Government Accountability Office . The report cites ways current border fencing, along 654 miles of the 2,000-mile border, enhances border security, but GAO also said Customs and Border Protection officials "cannot measure the contribution of fencing to border security operations."