As we’ve learned from this pandemic, human beings can act quickly in the face of immediate danger. However, we’re not so good at taking action against slow-moving threats. The threat posed by nuclear weapons is now as high as it’s been since the Cold War. This week on WorldAffairs, we talk about North Korea with veteran aid worker Katharina Zellweger, Pulitzer-nominated journalist Jean Lee and North Korean defector Joseph Kim. We also discuss Russia and nuclear proliferation with Dr. Ernest Moniz, who served as Secretary of Energy in the Obama Administration.