Stock photography picture of Martin Sheen marches with the United Farm Workers in California's Central Valley.

A8K4YC - Licenced Caption Martin Sheen marches with the United Farm Workers in California's Central Valley. Keywords horizontal, color, business, industry, agriculture, activism, activist, demostration, marching, protest, demonstrations, people, hispanic, flags, united, farm, workers, labor, unions, beliefs, 1994, demands, martin, sheen, actor, spokesperson, celebrity, california, flags, marchers