On Nov. 18, 1978, more than 900 Americans died in Jonestown, Guyana. Some committed suicide. More were murdered. And until 9/11, it was the largest single mass killing of American citizens. U.S. Rep. Leo Ryan was assassinated as he tried to rescue Jonestown residents desperate for freedom.

In CQ Roll Call's new podcast, we investigate Jonestown through the prism of congressional oversight, telling a story of corruption, international intrigue, race and betrayal.

Oversight. How can the lessons of the past inform decisions of today?