PBS Newshour: Do death row inmates have the right to know origins of lethal injection drugs?

As foreign supplies have dwindled, traditional lethal injection drugs are being replaced with others manufactured in the U.S. But inmates and lawyers are questioning whether these new drugs will result in death without undue pain and suffering. Gwen Ifill takes a closer look at the issue with Megan McCracken of the University of California, Berkeley and Joel Zivot of Emory University.