At around 07 minutes 23 seconds into the film, when the two embassy diplomats approach the building, in response to a question by one of the activists, one of them turns around and says 'It won't take long'. This is a great example of subtle Persian double-speak, since what he really means is not related to the event duration, but rather the duration of the uprising in Iran, which these activists are protesting for. It won't take long, meaning it will be finished soon, which is exactly what happened at the end of 2010.
The audio for the entire documentary is deliberately diegetic - even the anthem at the end was all location sounds. This tactic was not only due to budget restraints, but was primarily to give the film the feeling of immediacy and keep the action firmly grounded to the events of that day.