Those images persuaded, changed and influenced more people more rapidly than all the Iranian, American, or any other government Psychological Operations/Strategic Communications/Public Diplomacy efforts put together.
Volunteer, unpaid, informally trained or untrained, uncredentialed, equipped at their own expense with privately-owned Commercial Off The Shelf (COTS) gear acting as Combat Camera on the scene as events occurred provided visual information documentation (VIDOC) of the regime’s repression of dissent.
There are lessons to be learned from Iran for those who seek to prepare themselves.
[Note to self: learn how to use your damn HTC FuzeTM, dummy! I can use the camera to send a Multimedia Message, if I can figure it out]