Di Filippo, Paul. "Plumage from Pegasus: And I Think to Myself, What a Wonderful World"
Divergence: 1942 CE
What if: William S. Burroughs assassinated FDR, and when his apartment was raided, various strange documents about jazz, science fiction and conspiracies were discovered.
Published: In The Magazine of Fantasy and Science Fiction, July 1999; One Lamp: The Best Alternate History Stories from F&SF (ed. Gordon Van Gelder), q.v.; and Plumage from Pegasus, Cosmos 2006 (0809556103BUY).