I just stumbled on this video last night. Two of my 'heroes in music' are John Williams, and the Marine Band. This approx 8 minute video is of a rehearsal of the Marine Band with John Williams on his new piece written for the celebration of the 215th anniversary of the "President's Own, Marine Band. There's also a short interview with then director, Col. Michael Colburn. Mr. Williams still writes some great and challenging music.
Marine Band Celebrates Anniversary with John Williams