U.S. prepares to start building portion of Texas border wall

FILE - 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)

HOUSTON — 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.