The building in which the robbery takes place was filmed in the Marquette Building in downtown Chicago, now a National Historic Landmark.
Sgt. Joe, the 'Voice of Chicago':
I am the city, the hub and heart of America...
When Kelly looks at his watch, the minute hand is at 27, but the hour hand is just short of the 11.
This motion picture is respectfully dedicated to the police and police departments of America - a brave army of men and women who form our first line of defense in preserving our sacred principles of personal liberty and justice. We gratefully acknowledge the valuable assistance given by the City of Chicago and its police and Police Department, whose cooperation made this picture possible.
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