Support WBURRemembering Harold Arlen, The Mystery Man Behind 'Over The Rainbow'Play08:20Download AudioSusan StambergNovember 07, 2015 ShareComposer Harold Arlen (sitting, right) joins Judy Garland, Bert Lahr (far left), Ray Bolger (back row, left) and various executives for a Wizard of Oz sing-along in the NBC radio studio, circa 1939. (Getty Images)