Border Security: Progress and Challenges with the Use of Technology, Tactical Infrastructure, and Personnel to Secure the Southwest Border, Statement of Rebecca Gambler, Director, Homeland Security & Justice, Testimony Before the Subcommittee on Border and Maritime Security, Committee on Homeland Security, House of Representatives [open pdf - 6MB]
"DHS (Department of Homeland Security) has employed a variety of technology, tactical infrastructure, and personnel assets to help secure the nearly 2,000 mile long southwest border. Since 2009, GAO (Government Accountability Office) has issued over 35 products on the progress and challenges DHS has faced in using technology, infrastructure, and other resources to secure the border. GAO has made over 50 recommendations to help improve DHS's efforts, and DHS has implemented more than half of them. This statement addresses (1) DHS efforts to deploy and measure the effectiveness of surveillance technologies, (2) DHS efforts to maintain and assess the effectiveness of existing tactical infrastructure and to deploy new physical barriers, and (3) staffing challenges the Border Patrol has faced. This statement is based on three GAO reports issued in 2017, selected updates conducted in 2017, and ongoing work related to DHS acquisitions and the construction of physical barriers. For ongoing work GAO analyzed DHS and CBP (Customs and Border Protection) documents, interviewed officials within DHS, and visited border areas in California."
Government Accountability Office: http://www.gao.gov/