In this Aug. 11, 2017, photo, a U.S. Customs and Border Patrol agent passes along a section of border levee wall in Hidalgo, Texas. The government wants to build on the 3 miles (5 kilometers) of river levee cutting through the northern edge of the Santa Ana National Wildlife Refuge, separating the visitor center from the rest of the park. A gate in the wall would open and close for visitors. (AP Photo/Eric Gay)
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