(Cute touch... watch the violins at about 2:15.)
We lost him 64 years ago today. His Wikipedia entry is here, where you can read that trying to volunteer for service in WWII at age 38, initially none of the services were interested in him. Read the "Disappearance" section there... then read this link and come to your own conclusion about the mystery of his death.
Patriot and hero... his music still makes ya "pat your foot".