Exactly one year after announcing to the world the death of Osama bin Laden, President Obama is in Afghanistan on an unannounced visit. Mr. Obama is scheduled to deliver an address aimed at Americans this evening at 6:30 CT/7:30 E.T. You can hear live NPR coverage on WKU Public Radio. We'll also have coverage afterwards during our top-of-the-hour newscasts and Wednesday on Morning Edition.