The underground mine fire in Centralia, Pennsylvania, is widely regarded as the nation's worst. It's been burning for 45 years. We speak with the author of "The Day the Earth Caved In: An American Mining Tragedy". We'll also talk with the author of "Fit to be Crazy: Living with Lithium and Manic Depression," which provides a personal glimpse of what it's like for those with biochemical clinical depression. Guests: Joan Quigley & Jean Siphron