10 biggest strikes in U.S. history

POSTED: 11:21 AM EDT Sep 17, 2012    UPDATED: 10:27 AM EDT Oct 22, 2013 
San Fran BART strike

With transit workers in California's Bay Area returning to work, ending a strike that paralyzed the nation's fifth-largest train system, take a look back at the 10 biggest strikes in U.S. history.