United Farm Workers leader Cesar Chavez pauses during his 1,000-mile march through the agricultural valleys of California on behalf of the UFW union, Aug. 14, 1975. Organized by farm labor leader Cesar Chavez and others, between 5,000-10,000 laborers walked off the job, leading to the largest farm worker strike in U.S. history. Farmworker Adan Ramirez stands next to a statue of the late labor activist Cesar Chavez after the unveilling of the work on Monday, April 23, 2001, at Cesar Chavez Park in Sacramento, Calif. | AP