When the Cold War ended, four separate countries suddenly inherited the former Soviet nuclear arsenal. Destroying and removing those weapons was a herculean effort, and it couldn't have been done without the bipartisan leadership of two U.S. Senators. We tell the story with Senators Nunn and Lugar, as well as former Assistant Secretary of Defense Andrew Weber.

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In 1994, the United States negotiated an agreement with North Korea that curbed its nuclear ambitions for eight years. The collapse of the agreement offers lessons for diplomatic efforts today. Amidst heated rhetoric between President Trump and North Korean leadership, this episode dives into the agreement with North Korea experts Jon Wolfsthal, Joel Wit, and Ambassador Robert Gallucci.

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Contrary to popular belief, the first nuclear explosion in human history took place not in Japan, but in New Mexico. This episode dives into that test and explains why Congress is threatening progress made on nuclear arms control.

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It's been two years since the Joint Comprehensive Plan of Action -- commonly known as the Iran nuclear deal -- was signed. We speak to Ambassador Wendy Sherman, the lead U.S. negotiator of the agreement, and Richard Nephew, the lead American sanctions expert during the negotiations. Ambassador Sherman and Mr. Nephew discuss the merits of the agreement and the consequences of a U.S. withdrawal from it.

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In 1961, the Soviet Union tested the largest nuclear weapon in history. At about 3,800 times more powerful than the bombs used against Japan, the effects were unimaginable. This episode dives into this and other harrowing stories of nuclear testing. We also interview Dr. Michael Mills, a scientific expert on the catastrophic consequences of a nuclear war -- known as nuclear winter.

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In 1983, a movie was released about nuclear war that shocked 100 million Americans. This episode dives into the movie and how it impacted President Reagan to change his views on nuclear weapons policy. Washington Post Reporter Dan Zak is also interviewed about his book "Almighty," which profiles nuclear activists and covers the history of U.S. nuclear weapons.

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It was one of the tensest moments in American history. The discovery of Soviet nuclear missile infrastructure in Cuba set off a chain of events that could have exploded into nuclear war at any moment. This episode dives into the details and also covers the latest national missile defense test with Center expert Philip Coyle.

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One single person has the sole authority to launch U.S. nuclear weapons: The President of the United States. We spoke with Congressman Ted Lieu (D-CA) about his bill that would limit presidential nuclear authority. Our analysts also discuss the latest North Korean ballistic missile test that could have struck U.S. territory.

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During the Korean War, General Douglas MacArthur requested more than 30 nuclear weapons. This episode dives into the story and takes you inside modern day North Korea with MIT expert Dr. Jim Walsh.

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During the Korean War, General Douglas MacArthur requested more than 30 nuclear weapons. This episode dives into the story and takes you inside modern day North Korea with MIT expert Dr. Jim Walsh.