We've seen 1970s New York City cops laughing it up on the job, but the Bad Old Days weren't always so hilarious. Starting this week the Museum of the City of New York is unveiling their latest exhibit, titled Police Work: Photographs by Leonard Freed, 1972-1979. The expansive collection of vintage prints from the Brooklyn-born photographer show "life on the beat" during the "tumultuous" time, revealing "the complexity, the harshness, and the camaraderie of the city's public safety servants and the people they protected."

The photos first appeared in the Sunday Times in 1973, with the headline: "Thugs, Mugs, Drugs; City In Terror." Click through for a little look at the exhibit.