Drake, David. Fortress
Divergence: 1963 CE
What if: JFK escaped assassination and in 1965 announced a Star Wars-like missile defense program.
Summary: In 1985, a former NSA agent is caught between Americans, Neo-Nazis, Jews and space aliens in a fight for control of an orbital defense platform.
Published: Tor 1987 (0312930011), 1988 (0812536207, 0812536215).