There have been more huge protests in the Iranian capital Tehran as many people are protesting after claims a presidential election was fixed.
It's reported hundreds of thousands people took to the streets because they are angry with the current President, Mahmoud Ahmedinejad.
Getting information out of Iran is hard because the government has put tough restrictions on foreign journalists.
US President Obama has said he thinks Iranian voices should be heard.
President Mahmoud Ahmedinejad
But he doesn't want to be seen to be interfering in the internal politics of Iran.
The US and Iran have disagreed over lots of things in the past, and President Obama wants to try to rebuild their relationship, so he is being very careful.
He also said that there might not actually that much difference between the policies of President Ahmadinejad and his rival Mir Hossein Mousavi.