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Occupy Wall Street protests spread to Boston, L.A.

John Minchillo / AP

Protesters from Occupy Wall Street march through New York's financial district dressed as corporate zombies Monday, Oct. 3. The protests have gathered momentum and gained participants in recent days as news of mass arrests and a coordinated media campaign by the protestors have given rise to similar demonstrations around the country.

Josh Reynolds / AP

Commuters walk past demonstrators with Occupy Boston outside their tent village in Boston's Financial district on Monday, Oct. 3. The group is part of a nationwide movement in support of the Wall Street protests in New York.

Frederic J. Brown / AFP - Getty Images

Protesters shout slogans while holding banners after marching to the courthouse where the trial for Michael Jackson's doctor continues on October 3, 2011 in Los Angeles. They say they are inspired by revolutions in the Middle East, but protests over economic grievances in Spain and elsewhere in Europe are a closer comparison as anti-corporate demonstrations spread across the United States.

The Occupy Wall Street protests are entering their third week and show no signs of relenting.  Protesters in Boston, Los Angeles and Chicago have joined in demonstrating against economic inequality. There are also now several unions backing the protesters, which could lead to even larger protests this week.

Demonstrators angry at economic inequality and the role of big corporations are starting their third week of protests, saying they will camp out at a park near Wall Street indefinitely. The group now has the backing of several major unions, and the biggest rally yet could come this week. NBC's Michelle Franzen reports.