In 1944, to honor the Allied victory in Italy, Arturo Toscanini conducted Verdi's Hymn of the Nations, built on the national anthems of Britain, France, and Italy. In order to honor all four of the major Allies, Toscanini decided to add "The Star Spangled Banner" and the "Internationale" for the Soviet Union.
The music was performed by the NBC Symphony Orchestra, with the Westminister Choir, and Jan Peerce as soloist. It was filmed as a featurette to be shown in movie theaters and was narrated by Burgess Meredith.
In the early 50's, at the height of McCarthyism, U.S. censors excised the portion of this performance that featured the "Internationale."
For more than a half a century, the sequence in the original featurette was missing, but recently a copy was found — it's worth watching.