Audie Cornish talks to Kevin Bales, a professor of contemporary slavery at the University of Hull and lead author of the 2013 Global Slavery Index. The first-time report by the Walk Free Foundation estimates that there are nearly 30 million people in slavery across the globe.
President Obama will nominate attorney Jeh Johnson to be the next Homeland Security secretary.
Johnson recently served as the Pentagon's top lawyer.
Obama will announce his pick at 2 p.m. Friday, NPR's Scott Horsley tells us.
The Department of Homeland Security is currently without a leader. Former Secretary Janet Napolitano ended her stint six weeks ago. She left to become the president of the University of California system.