What Losing The Greenland Ice Sheet Means For The Planet; What Is ISIS-K?

Greenland's ice sheets contain enough water in ice to raise sea levels by about 24 feet. Josh Willis, lead scientist on NASA's Oceans Melting Greenland mission, discusses the ice's instability in the face of global warming. And, terrorist group ISIS-K claimed responsibility for a suicide bombing that killed more than 170 people last week. Andrew Mines of George Washington University's program on extremism talks about the group and its motives.