Why the children of Claxton, Tennessee, have a playground built on top of coal ash

In the hills of East Tennessee, just a half hour outside Knoxville, is a wood-framed playground that looks like a palace for children. It’s just over 20 years old, designed by kids and built by a community that wanted to create a place where its children could play for years to come. And it sits in the shadow of a tall coal smokestack that was constructed in the 1960s.