He also conducted broadcast performances of Copland 's El Salon Mexico and Gershwin 's Rhapsody in Blue with soloists Earl Wild and Benny Goodman and Concerto in F with pianist Oscar Levant , as well as music by other American composers , including two marches of John Philip Sousa . He also conducted broadcast performances of Copland 's El Salon Mexico ; Gershwin 's Rhapsody in Blue with soloists Earl Wild and Benny Goodman and Piano Concerto in F with pianist Oscar Levant ; and music by other American composers , including marches of John Philip Sousa .