Hundreds of thousands across the nation marching and rallying will be fusing the fight for workers' rights and the fight for immigrant rights.
Workers are rallying and marching at job sites and government offices not just to remember those killed on the job, but to oppose GOP attempts to dismantle job safety laws.
A 30-month struggle by The News-paper Guild of New York with one of the world's big wire services, Thomson-Reuters over "tweets" critical of working conditions.
It's just one word in labor history with a lot of associations: Haymarket.
"This is about eliminating the organizations that represent people. With one vote they are trying to take away our rights."
Collective bargaining remains one of the few effective ways to preserve the American middle class, the chair of the National Labor Relations Board says.