Major union organizations are joining the #OccupyWallStreet protests now entering day 13 of the occupation of Zuccotti Park in NY.

he “Occupy Wall Street” protests, now entering their third week, are poised to get a whole lot bigger than its core of 200 to 300 people, potentially even exceeding the protesters original goals of 20,000 demonstrators, thanks to recent pledges of support from some of New York City’s largest labor unions and community groups.

On Tuesday, over 700 uniformed pilots, members of the Air Line Pilots Association, took to the streets outside of Wall Street demanding better pay.

On Wednesday night, the executive board of the New York Transit Workers Union (TWU Local 100), which represents the city’s all-important train and bus workers, voted unanimously to support Occupy Wall Street. TWU Local 100 counts 38,000 active members and covers 26,000 retirees, according to its website.

The Union on Thursday used Twitter to urge members to take part in a massive march and rally on Wednesday, Oct. 5. That effort is being co-sponsored by another eight labor and community outreach organizations.