Fast Food workers strike in the U.S. (10 images)

Fast food workers join a 100-city strike calling for $15-an-hour wages and the right to form a union without employer interference at a McDonald's restaurant in the Silver Lake area of Los Angeles on December 5, 2013. UPI/Jim Ruymen

Supporters of Washington, D.C. area fast food workers participate in a protest outside of Smithsonian's Air and Space Museum as they rally to show support for the employees's of the McDonald's restaurant inside, in Washington, D.C. on December 5, 2013. This was part of a 100-city nationwide fast-food strike calling on the President Obama to lead by example through an executive order ensuring companies doing business with the federal government pay a livable wage. UPI/Kevin Dietsch

A woman dressed as a clown protests with supporters of Washington, D.C. area fast food workers outside of Smithsonian's Air and Space Museum as they rally to show support for the employees's of the McDonald's restaurant inside, in Washington, D.C. on December 5, 2013. This was part of a 100-city nationwide fast-food strike calling on the President Obama to lead by example through an executive order ensuring companies doing business with the federal government pay a livable wage. UPI/Kevin Dietsch

Fast food workers march around a McDonalds restaurant, taking part in a massive one day fast food industry strike demanding higher wages in St. Louis on December 5, 2013. Workers in St. Louis and 100 cities around the United States are walking off the jobs, fighting for higher salaries, $15 an hour, plus the right to form a union without retaliation. UPI/Bill Greenblatt