The finale of Tchiakovsky's 1812 Overture is heard just as the ending credits begin. This is a callback to the beginning of the movie when Glen turns the car radio off just before this segment begins.
Schubert's Ave Maria is listed as written by Chopin.
The opening credits are projected onscreen against a backdrop of a photo of a United States atomic bomb test at Bikini Atoll, summer of 1946, revealed as the camera slowly pulls back from the beach and ocean.