In this Aug. 11, 2017, file photo, a U.S. Customs and Border Patrol vehicle passes along a section of
border levee wall in Hidalgo, Texas. The U.S. government is preparing to begin construction of more
border walls and fencing in South Texas’ Rio Grande Valley, likely on federally-owned land set aside as
wildlife refuge property. Heavy construction equipment is supposed to arrive starting Monday. A photo
posted by the nonprofit National Butterfly Center shows an excavator parked on its property. (AP
Photo/Eric Gay, File)