(Eric Gay | The Associated Press) In this March 14, 2019, file photo, a group of migrant families walk from the Rio Grande, the river separating the U.S. and Mexico in Texas, near McAllen, Texas, right before being apprehended by Border Patrol. U.S. border authorities say they’ve started to increase the biometric data they take from children 13 years of age and younger, including fingerprints, despite privacy concerns and government policy intended to restrict what can be collected from migrant youth.