About 12% of U.S. workers were union members last year. Here are 8 of the most heavily unionized jobs.
Unions have the largest influence in New York, where 24% of wage and salary workers were union members in 2011.
A wave of workers protests hits the U.S., from Wal-Mart, McDonald's and shipping ports. Have employees had enough with low wages at a time when corporate earnings are soaring, or are they feeling more secure as the economy improves?
Michigan legislators approve right to work bills Tuesday. Protesters descend on Statehouse.