Fast-food workers march toward the Smithsonian's National Air and Space Museum in Washington, D.C., on Thursday. Similar rallies occurred in about 100 cities across the U.S. Morgan Walker/NPR hide caption

itoggle caption Morgan Walker/NPR

Voters in SeaTac, Wash., have narrowly approved a measure raising the minimum wage at its international airport, officials say. But the initiative faces several challenges, including a recount. Elaine Thompson/AP hide caption

itoggle caption Elaine Thompson/AP


itoggle caption Richard Drew/AP


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Outside a Taco Bell restaurant in Warren, Mich., early Thursday, supporters of the push by fast-food workers to raise the minimum wage were marching. Jessica J. Trevino /MCT/Landov hide caption

itoggle caption Jessica J. Trevino /MCT/Landov

People gathered outside a Wendy's restaurant in New York City on Monday as part of a one-day strike calling for higher wages for fast-food workers. Justin Lane/EPA/Landov hide caption

itoggle caption Justin Lane/EPA/Landov