The movie's source novel was inspired from the murder of Israeli athletes by Palestinian terrorists at the 1972 Munich Summer Olympics Games as co-ordinated by the Black September organization. The title "Black Sunday" references "Black September". Harris wrote the novel after seeing the hostage crisis on television. These real-life events became the subject of the Academy Award (Oscar) Winning documentary One Day in September (1999).
Two Goodyear blimps were used for the suspenseful conclusion. The base scenes where shot in Carson, CA using the Columbia. The Super Bowl scenes were shot in Miami, FL using the Mayflower being a much smaller blimp than Columbia. So the blimp shrinks, gets big again and then shrinks again in size.
When Kabakov is first seen in the hospital, he is unshaven. Moshevsky leaves to make a phone call, and is killed. A short time later, when Kabakov is informed that his friend was killed, he is now clean-shaven.
The president shown attending Super Bowl X was Pres. Jimmy Carter. Super Bowl X was held in January 1976. Pres. Carter was elected in November 1976 and took office in January 1977. Pres. Ford was in office during Super Bowl X.
FBI Agent Sam Corley: The President isn't persuaded that attending the Super Bowl will pose a threat to his life. I suppose it's the more important threat on his mind; he's slipping in the polls! Eighty-two thousand, five hundred twenty-eight, to be exact!