Thomas S. Blanton

Hillary Clinton used her private email address for all correspondence while at the State Department. Now, the media can't agree on what law she broke—or didn't. 

Today's Please Explain looks at spying, the organizations that do it, and how it's carried out and why. We're joined by Thomas S. Blanton, from George Washington University National Security Archives, and Joseph Weisberg, former CIA operative and author of An Ordinary Spy.