Reply #5: That was the plot of the film "Black Sunday"

[NYCGirl]

Bruce Dern is ideally cast as Lander, a crazed Vietnam veteran, in Black Sunday. Lander joins terrorists Dahlia (Marthe Keller) and Fasil (Bekim Fehmu) in a plot to create a bloodbath at the annual Super Bowl. Piloting the ubiquitous Goodyear blimp, Lander is to ram the aircraft into the capacity Orange Bowl crowd, then fire thousands of poisoned darts into the fleeing spectators. Israeli military officer Kabakov (Robert Shaw) struggles to thwart Lander's plan before it comes to fruition. As unbelievable as it may sound on paper, Black Sunday is wholly credible on film. -- Hal Erickson

http://www.allmovie.com/cg/avg.dll?p=avg&sql=1:5949