Former FBI Director James Comey is testifying before the Senate Intelligence Committee on Thursday. Before Comey was fired on May 9, he led the FBI's investigation into Russian interference in the 2016 election and potential ties between Trump associates and Russia. That probe is now led by a special prosecutor.

On the 21st: We speak with U.S. Senator Tammy Duckworth and a constitutional law expert from the University of Illinois about the firing of FBI director James Comey. We also ask: How can understanding trauma help stop violence?

The White House has fired FBI Director James Comey, who was overseeing an investigation into Russian meddling in the 2016 elections and possible ties to the Trump campaign and top aides.