I crossed over and watched with admiration 100s of women, men, children, with placards in Persian (I think) and English, holding photographs I surmised came from Iran over telephone links, showing protesters downed, etc. Their chants included:free political prisoners jailed for their protests, grant women freedoms, separate church and state, free elections, recount the votes, UN please help stop the government, etc. They sang their national anthem, they listened to speakers in both English and Persian.
At least one of the people wore a mask, and from the NY Times or NPR, I have learned that many protesters here wear masks to avoid having their families damaged by their speaking out. The crowd was from their 70s to their teens with some babies, and children. I would guess that there were more than 300 people there.
Lytton Plaza serves us well at such times. I was deeply moved by the experience. We should all wear green to protest the unfair elections and status of Iranians.