A pair of U.S. Customs and Border Patrol agents look at tracks in the sand along the floating fence that makes up the international border with Mexico, Wednesday, July 18, 2018, in Imperial County, Calif. About 126-miles of border cuts through the Yuma Sector where thousands of families and unaccompanied children are continuing to cross into Arizona and California even after learning of the government's family separation policy upon apprehension. (AP Photo/Matt York) **FILE**
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