A singer, and the struggle for civil rightsSt. Paul, Minn. April 17, 2011 11:00 p.m.Share storyTwitterFacebookListenFILE - In this undated file photo, singer and pianist Nat "King" Cole is shown.ASSOCIATED PRESSGalleryFullscreen SlidePrevious Slide1 of 1ASSOCIATED PRESSFILE - In this undated file photo, singer and pianist Nat "King" Cole is shown.Next Slide