Students cheer while listening to protesters, following the announcement that Tim Wolfe, the president of the University of Missouri System, would resign. Jeff Roberson/AP hide caption

Sgt. Alvin C. York in 1919. Department of U.S. Army/AP hide caption

Veterans groups, like the American Legion and Veterans of Foreign Wars, are struggling to recruit and engage younger veterans who served in the Iraq and Afghanistan wars. Annette Elizabeth Allen/NPR hide caption

The drug sold as K2, spike, spice or "synthetic marijuana" may look like dried marijuana leaves. But it's really any of a combination of chemicals created in a lab that are then sprayed on dried plant material. Spencer Platt/Getty Images hide caption

Kalu James moved to Austin, Texas, eight years ago, but bought health insurance for the first time this year. Twenty percent of the city's musicians live below the federal poverty line. Veronica Zaragovia/KUT hide caption

Granola cereals on a shelf in Glenview, Ill. "If the FDA were to create a more strict, more comprehensive definition, it would give manufacturers a lot more guidance on whether or not they could use the term 'natural' on their food products," says lawyer Ivan Wasserman. Tim Boyle/Getty Images hide caption

Researchers at Brown University's computer science department are studying whether a robot called Baxter can be taught to pick up different objects. Joe Palca/NPR hide caption