Although most of the film was shot in HD with Panavision Genesis cameras, about a week of shooting was done on 35mm film because the location was forecast to be over 110 degrees Fahrenheit, and the filmmakers were concerned that the relatively new and under-tested Genesis would overheat and fail.
While flying in a black-hawk helicopter with the doors open, FBI agents speak to one another casually as though the overwhelming noise of the wind and rotors is non-existent.