When protesters, calling themselves the Occupy Wall Street movement, started to stage demonstrations in New York weeks ago, no one took too much notice.
But since then the protests have been picking up steam - spawning similar sit-ins across the country.
Among their ranks: progressive activists, labor unionists, students and anarchists.
So is the American left responding to the conservative populism of the Tea Party movement?
The BBC's Paul Adams reports from Washington about who is participating in the Occupy Wall Street protests.
This segment aired on October 7, 2011.