This year, an estimated 18,000 American children will disappear, but their families will not be looking for them. Neighbors will not canvas the streets. Our Facebook feeds will not show their pictures. And after six months, the records of their existence may close entirely. This is the fate awaiting children who vanish while in the care and custody of Americas child-protection system. No matter the reason for falling off the grid, many of these boys and girls will resurface on the black market as child sex slaves. According to the FBI, more than half of trafficked children in America were in the care of social services when they disappeared. That is a damning statistic for a system whose sole purpose is to keep children safe. Withelma T Pettigrew, one of TIME magazines 100 most influential people, was one of those children in foster care who became a trafficking victim. T testified to Congress: I spent, for the most part, the first 18 years of my life in the foster-care system. Seven of those years, I was a child being sexually trafficked on the streets, Internet, strip clubs, massage parlors ... Traffickers, pimps, exploiters have no fear of punishment because they rely on the lack of attention that occurs when these young people go missing. The National Center for Missing and Exploited Children found that historically, many of these children were not being reported missing. To correct that, federal law enacted in 2014 required that state agencies must report a missing child to law enforcement within 24 hours.