On this edition of “60 Minutes,” Rafael Grossi is the director general of the International Atomic Energy Agency (IAEA). Lesley Stahl reports Grossi’s most urgent mission: trying to reach an agreement between the Russians and the Ukrainians to protect Europe’s biggest nuclear power plant in Russian-controlled Ukraine. A meltdown could lead to a nuclear catastrophe bigger than Chernobyl. As soccer fans head to Qatar, many will be sifting through packs of World Cup stickers. Think of them as soccer’s answer to baseball cards. Jon Wertheim meets Panini sticker enthusiasts to find out why these collectibles inspire such a frenzy. Sharyn Alfonsi visits the Wyoming Honor Farm, a state-run minimum-security prison in the middle of horse country doing its part to help with the wild horse population through a program where inmates train the horses.