2:54 p.m. ET: ABC News' Aaron Katersky reports: A couple hundred students walked out of class at John Jay College of Criminal Justice in New York to join the Occupy Wall Street protests against corporate greed and fiscal inequality. A few carried signs but most were content to shout their opposition to tuition hikes, cuts in financial aid and what they say are attempts to privatize their school which is part of the City University of New York.
"A lot of students are really fired up now," said Sally Abdulgafar, one of the student organizers. "We're revolting like the Arab Spring."
Kenny Cruz, another of the student organizers, said, "Here, in the midst of a crisis billions of our tax dollars have gone to war, gone to bailouts for corporations. What has education seen? Cuts. This isn't OK."
2:40 p.m. ET: ABC News' Gregory J. Krieg reports: If the weather is any indication, and it usually is with these things, organizers should get the big crowd they wanted ... and then some. It's hot out here. The first rally, at Zuccotti Park, is scheduled for 3 p.m. We ran into a group of about 30 CUNY students chanting (and headed downtown) outside the 59th St Columbus Circle subway stop. Their signs read, "We are the 99 percent."
1:20 p.m. ET: The protest today in lower Manhattan is expected to be Occupy Wall Street's largest demonstration yet. Organizers are planning for at least 2,000 people to participate and the movement is getting a significant boost from at least 15 major labor unions that are joining today's rally and march.
The AFL-CIO, United Auto Workers, and Transit Workers' Union are a few of the groups planning to stand in solidarity with the hundreds of primarily young adults who have spent the better part of three weeks organizing from Zuccotti Square.
Today's action is scheduled to begin at 3 p.m. ET, when the protesters in Zuccotti Square march approximately one mile north to Foley Square, where they will be met by community and labor leaders. Then, at 4:30 p.m., they plan to match together back down toward Wall Street. They do not yet have a city-issued permit for the gathering, but are now pursuing one.
Organizers are also calling on college students around the country to protest by walking out of class at 2 p.m.