A boy works at an illegal gold mine in northern Nigeria. Lead from these mines has sickened thousands of children in the region. David Gilkey/NPR hide caption itoggle caption David Gilkey/NPR Shots - Health News Nigeria Pressured To Clean Up Lead-Contaminated Villages December 6, 2012 Last spring, the Nigerian government pledged millions of dollars to decontaminate a region where hundreds of kids have died from severe lead poisoning. So far, none of the money has been released. The delay in the cleanup puts thousands of kids at risk of getting sick, public health advocates say.