In this March 14, 2019, file photo, families who crossed the nearby U.S.-Mexico border near McAllen, Texas are placed in a Border Patrol vehicle. U.S. border authorities say they‚Äôve started to increase the biometric data they take from children 13 years of age and younger, including fingerprints and DNA samples, despite privacy concerns and government policy intended to restrict what can be collected from migrant youth.