Mentioned in the DVD commentary, is that the Tunnel (used to trap McClain and Farrel with traffic from both directions in DC) was an open tunnel and they had to shoot at night because they could not afford to cover it with their production budget. This is obvious from most of the shots pointed to the room where you can see a "break into night" opening. Submitted by Good Job!

The FBI agent who is assigned to escort John & Matthew through D.C introduces himself as "agent Johnson." Then John says "Agent Johnson? Great." This is a nod to the first "Die Hard," which featured a pair FBI agents named Johnson.

Bonnie Bedelia makes a cameo as John's ex-wife, Holly, via a picture of her driver's license. Submitted by Cubs Fan

The film's title is a reference to New Hampshire's state motto "Live Free or Die." The film was shipped to theaters under the title "New Hampshire." Submitted by Cubs Fan