For 10 points, name this American composer of Fanfare for the Common Man.
All three of this composer's symphonies were premiered by conductor Serge Koussevitzky (cow-seh-VIT-ski), including the third, which adds a woodwind duet to an earlier piece celebrating American soldiers in World War II. This student of Nadia Boulanger used a hymn celebrating simplicty and freedom in a ballet he collaborated on with Martha Graham; that work joins Billy the Kid and Rodeo among this composer's ballets and is called Appalachian Spring. For 10 points, name this American composer of Fanfare for the Common Man.
All three of this composer's symphonies were premiered by conductor Serge Koussevitzky (cow-seh-VIT-ski), including the third, which adds a woodwind duet to an earlier piece celebrating American soldiers in World War II.
Aaron {Copland}