If you saw American Gangster starring Russell Crowe and Denzel Washington this weekend, you viewed what many critics believe to be one of the year’s best movies. But AG screenwriter Steve Zaillian sees the Ridley Scott-directed film more as an ’70s cop movie than a gangster movie.

So take a wistful trip back to the 1970s and tell us which movie was your favorite gritty cop movie of the era.