Secretary of State-designate Rex Tillerson listens as right as former Georgia Sen. Sam Nunn introduces him on Capitol Hill in Washington, Wednesday, Jan. 11, 2017, during Tillerson's confirmation hearing before the Senate Foreign Relations Committee.

Secretary of State-designate Rex Tillerson listens as right as former Georgia Sen. Sam Nunn introduces him on Capitol Hill in Washington, Wednesday, Jan. 11, 2017, during Tillerson's confirmation hearing before the Senate Foreign Relations Committee.

As one of the leading figures in efforts to end nuclear proliferation, former U.S. Senator Sam Nunn shares his thoughts about the Trump summit with Political Rewind.

Sam Nunn is the Co-Chair of the Nuclear Threat Initiative.