US Customs And Border Security Agents Patrol Texas-Mexico Border
John Moore / Getty Images
July 21, 2014
Undocumented immigrant families turn themselves in to U.S. Border Patrol agents on July 21, 2014 in McAllen, Texas. Thousands of immigrants, many of them minors from Central America, have crossed illegally into the United States this year, causing an unprecentented humanitarian crisis on the U.S.-Mexico border.