More than one million demonstrators took to the streets throughout Brazil on Sunday, demanding governmental change and calling for the impeachment of their president.
To impeach means to charge someone in an official position with misconduct.
These aerial images of the massive crowd of protesters were captured from a drone. Demonstrators shouted "out Dilma!" They want President Dilma Rousseff to resign or face impeachment. And they're mad about what they say is corruption.
Rousseff has been under fire because of the country's weak economy, and a scandal involving the state-run oil company.
She has not been implicated, but was a high-level executive in the company at the time of the alleged corruption.