The American Civil Liberties Union is demanding the government find and reunite thousands more migrant children who have been separated from their parents at the border.
A top U.S. Health and Human Services official defended the agency's accounting of children separated from their parents.
Just weeks ago, an HHS inspector general issued a report that said thousands of additional children may have been taken from their parents or guardians at the border.
KQED was at San Francisco International Airport when a toddler who had been separated from her family on December 28, 2018 was reunited with her mother.