What happens to immigrant children detained at the US-Mexico border? Their first stop is a large warehouse, subdivided by chain link fences into separate areas for boys and girls, men and women. Dr. Fernando Stein, President, American Academy of Pediatrics says the lights are on 24/7 and kids are absolutely silent. They’re likely to be there for days, and their next stop, while better, still feels like a jail, where their average stay is more than a month. Dr. Stein says simply, this is unhealthy.