As many as 3,000 immigrant children are still living without their parents in federal shelters, the U.S. Department of Health and Human Services disclosed, but the agency said it’s prepared to begin reunifying them using DNA tests to expedite the process. President Trump reversed his policy last month of separated immigrant families who crossed the border illegally after it led to protests and numerous congressional visits to detention shelters. The administration also has asked a federal court to let it detain immigrant parents and their children together indefinitely, contrary to a longstanding decree allowing the government to hold children for no longer than 20 days. A recent court order required all separated children under age 5 to be released July 10, but the government has asked for more time, saying it can’t comply with the order. Most of the families had entered the U.S. illegally across the southern border, with some fleeing violence in their home countries in Central America.