More than 32,000 people showed up at AT&T Stadium in Texas for the premiere of "13 Hours: The Secret Soldiers of Benghazi" but some left early amid trouble hearing the movie.
Organizers provided 30,000 free tickets for Tuesday night's showing at the home of the Dallas Cowboys.
Stadium spokesman Joe Trahan (TRAY'-han) says a high-definition screen was lowered and sound engineered for guests on the first, second and third levels.
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The fourth level was opened because so many additional people showed up. Trahan had no estimate on how many people in the upper area left due to sound issues.
The movie is about the 2012 attack on the U.S. consulate in Benghazi, Libya, and heroic actions of veterans serving as private security. Four Americans were killed, including Ambassador J. Christopher Stevens.