Tens of thousands of demonstrators continue to openly defy Iranian President Mahmoud Ahmadinejad for the fourth straight day.
Opposition leader Mir Hossein Mousavi encouraged supporters to rally Thursday in Tehran's Imam Khomenei Square, a large plaza in the heart of the capital named for the founder of the Islamic Revolution.
Click play for more coverage on the election protests in Iran with CBN News Senior Reporter George Thomas.
Urging his supporters to wear black, Mousavi says people should mourn the alleged election fraud during Friday's vote and the lives lost during this week's protests.
Seven demonstrators were reportedly killed by police as hundreds of thousands of Iranians have taken to the streets.
The last time Iran had demonstrations this big was 30 years ago.
"The demonstrations today are eerily reminiscent, in terms of numbers, of the demonstrations that led to the over throw of the shah of Iran," said the New America Foundation's Afshin Molavi.
"Right now, they are showing how much of a thirst they have for democracy," explained Ali, a Canadian citizen with family in Iran. "How much of a thirst they have for individual rights, for human rights."
Iran's main electoral authority invited Mousavi and two other candidates who ran against Ahmadinejad to a meeting in effort to satisfy the protesters' demands.
Mousavi, who has said he won the vote, charges the Guardian Council is not neutral and supports Ahmadinejad and has demanded an independent investigation and a new election.
The Council's spokesman, Abbasali Khadkhodaei, said Thursday that it received a total of 646 complaints from the three candidates who ran against Ahmadinejad in the June 12 election.
The large number of complaints raised the possibility that even a limited recount could turn into a far larger problem.
"I think the government is frightened about the prospect of a regime change," explained Hooshang Amirahmadi of the Iranian-American Institute. "In fact, they are already frightened by well-bred, so-called college revolution."
Iranian authorities are muzzling Web sites and other networks used by Mousavi's backers to share information with each other and the world. They are trying to get the word out that most foreign journalists have been banned from reporting in the streets.