One of the most unsettling aspects of the conspiracy is that the plotters would "mask" their real target with several other randomly chosen targets, making the crime appear motiveness and random when it was not. This theme has occurred before in one or two Hitchcock films and television series shows, however.
The movie turns on some car chases, including one involving driving the wrong way in the Fort Pitt Tunnel, and a nice part toward the end for Robert Duvall as Cash, operating a rifle range. The climactic scene happens in a quarry, but it's made to look almost like a mountaintop removal mine.
Picture: Pirates ballpark, my visit in 2007.