Filmmaker Pegah Ahangarani discovered the genesis of her documentary "Rehearsals for a Revolution" while visiting her grandmother's house in Iran. She found a photograph showing a man standing next to her father, but his face had been scratched out. When Ahangarani asked her grandmother about the image, her grandmother explained that the man was her father's best friend who had been executed after the Revolution because he was a political prisoner.
The documentary, described as award-winning, emerged from this personal discovery.