Young boys sleep in a holding cell where hundreds of mostly Central American immigrant children are being processed and held at the U.S. Customs and Border Protection Nogales Placement Center on Wednesday, June 18, 2014, in Nogales, Ariz. CPB provided media tours Wednesday of two locations in Brownsville, Texas, and Nogales, that have been central to processing the more than 47,000 unaccompanied children who have entered the country illegally since Oct. 1. (AP Photo/Ross D. Franklin, Pool)