Jim Walsh PhD '00 is one of a small number of Americans who has traveled to North Korea and Iran for talks with officials about nuclear issues. A research associate in the MIT Security Studies Program, he is an international security expert who has testified before the US Senate on terrorism and Iran’s nuclear program.

On June 4, 2012, Walsh offered his thoughts on international security, nuclear weapons, and terrorism and took questions from the worldwide MIT community via video chat. Watch the video then join the discussion online.