On tonight’s edition of The Big Interview, Dan Rather sits down with the legendary Oak Ridge Boys. The Oaks are best known for their unparalleled four-part harmonies. They have appeared before five US presidents including former President George HW Bush and the late Barbara Bush, whose quick wit and sense of humor made a lasting impression on them. This clip was filmed back in February. Dan’s hour long interview with the Oak Ridge Boys premieres May 1 at 9pE/8pC/6pP on AXS TV.