A U.S. Customs and Border Protection (C.B.P.) officer, left, looks at three brothers who were sent unaccompanied across the border into U.S. custody, Saturday, Jan. 18, 2020, in Matamoros, Mexico. A number of parents in the refugee camp have sent their children into C.B.P. custody because they believe that is safer for their children than staying inside the dangerous camp. (Michael M. Santiago/Post-Gazette)