In 2009, Whitesnake toured with Judas Priest on the "British Steel" Anniversary Tour. On 11 August 2009, Whitesnake was playing a show at Red Rocks Amphitheatre in Morrison, Colorado, when Coverdale suffered a vocal injury. After seeing a specialist, it was announced on 12 August 2009 that Coverdale is suffering from severe vocal fold edema. He has a left vocal fold vascular lesion. The rest of their tour with Judas Priest was cancelled.