The Keystone State is the official nickname of Pennsylvania. The word keystone is from architecture, it describes the central wedge-shaped stone in an arch which holds all the other stones in place. Pennsylvania is called "The Keystone State" because it was the middle colony of the original thirteen colonies, and because Pennsylvania has held a key position in the economic, social, and political development of the United States (source: statesymbolsusa.org). Pennsylvania became the 2nd state of the United States of America in 1787.
These movies have a connection with Pennsylvania. They are (partially) filmed there or it's a topic in the story. Which movie (or movie poster) do you associate the most with Pennsylvania?