Die Hard 4.0

After the project was initially stalled due to the September 11, 2001 attacks, production eventually began, and the film's title was switched several times. A variety of visual effects were used for action sequences, even though Wiseman and Willis stated that they wanted to limit the amount of CGI in the film. In separate incidents during filming, both Willis and his stunt double were injured. Unlike the prior three films in the series, the US rating was PG-13 rather than R, thus toning down the language and violence by great lengths when compared to the first three films in the series. The original, uncensored version of Live Free or Die Hard was made available for the DVD release.