Labor Day in the United States is a time to honor the contribution of workers. Recently, workers in the U.S. have fallen on tough times. Unemployment is high, while wages and benefits continue to decline -- along with the ranks of organized labor. With the presidential campaign in full swing, both candidates are claiming they can do what's best for the American worker. On this Labor Day, we take a look at the relationship between union membership and wages in the U.S. Jeff Swicord reports.