Here And There With Dave Marash

Vladimir Putin is threatening to use nuclear weapons because of "aggressive language" by opponents of his invasion of Ukraine. Sticks and stones may break his bones, but harsh words have Putin brandishing nuclear threats. He's done this before, but never during actual war-time. Nuclear weapons expert Joseph Cirincione of the Quincy Institute on what Putin's threat really means. Does the concept of nuclear arms control have a future now?