IMMIGRATIONFirst glimpse of immigrant children at holding facilityYoung boys sleep in a holding cell at U.S. Customs and Border Protection's Nogales Placement Center on June 18, 2014.Ross D. Franklin/APA U.S. Customs and Border Protection officer helps two young boys pick out clothes at the U.S. Customs and Border Protection Nogales Placement Center on June 18, 2014.Ross D. Franklin/APA U.S. Customs and Border Protection officer helps boys who are trying to make phone calls at the U.S. Customs and Border Protection Nogales Placement Center on June 18, 2014.Ross D. Franklin/APYoung detainees are escorted to an area to make phone calls at the U.S. Customs and Border Protection Nogales Placement Center on June 18, 2014.Ross D. Franklin/APCustoms and Border Protection agents staff a medical station at the Nogales Placement Center on June 18, 2014.Ross D. Franklin/APA young boy bows his head in a holding cell at the U.S. Customs and Border Protection Nogales Placement Center on June 18, 2014.Ross D. Franklin/APCPB provided media tours on June 18, 2014, of centers in Brownsville, Texas, and Nogales, Arizona, that have been central to processing the unaccompanied children who have entered the country illegally.Ross D. Franklin/AP