the tape was discovered by a man named steven tull. steven tull's father did the interview with dr. king for a book that the father was planning to write. that book was never written and eventually the tape was just forgotten. as one might imagine, historians are extremely interested in that find. tull says he plans to sell the recording to a private collector later this month. he already has an agent in new york to help him to do that. >> wow. >> that's our broadcast for now. "nightly news" coming up next. >> we hope to see you a little later tonight on news 4 at 11:00. i'm barack obama and i approve this message now mitt romney's attacking the president on medicare? the nonpartisan a-a-r-p says obamacare "cracks down on medicare fraud, waste, and abuse and strengthens guaranteed benefits." and the ryan plan? a-a-r-p says it would undermine medicare and could lead to higher costs for seniors... and experts say ryan's voucher plan could raise future retirees costs more than six thousand dollars. get the facts. these days, hey, girls! nobody has time to get sick. mom, i don't feel go