The AFL-CIO spent more than $50 million worth of its members' dues and deployed 250,000 workers to support President Obama during his campaign. But three years later, workers say big unions have failed to deliver on their promises and are struggling to defend even long-held rights. Instead, workers are organizing themselves on the grassroots level to push for reform. Founded by homeless day laborers and run out of a former homeless shelter, United Workers isn't a union; it's a collective of 3,000 low-wage workers from all walks of life in Baltimore.