An unprecedented 69,550 migrant children held in U.S. government custody over the past year, enough infants, toddlers, kids and teens to overflow the typical NFL stadium. That’s more children detained away from their parents than any other country, according to United Nations researchers. And it’s happening even though the U.S. government has acknowledged that being held in detention can be traumatic for children, putting them at risk of long-term physical and emotional damage.