MTG 2.0 – Correspondent Lesley Stahl sits down with political lightning rod Rep. Marjorie Taylor Greene in her first interview since abruptly announcing her resignation from Congress. Back in Greene's Georgia district, Stahl talks with the longtime Donald Trump loyalist about her fractured relationship with the president, the state of the America First movement, and whether Greene's reinvention is a genuine evolution or a strategic reset that positions her for a post-Trump world. Denise Schrier Cetta is the producer.Character AI – Amid growing concerns about artificial intelligence's impact on young people and a surge of child-safety lawsuits, correspondent Sharyn Alfonsi investigates the next frontier: AI chatbots. She speaks with parents who lost their daughter to suicide, who say chatbots on the popular platform Character AI led her down a dark and sexually explicit path. She also hears from researchers and a psychologist who further reveal the scale – and dangers – of what's unfolding inside this rapidly growing AI technology. Ashley Velie is the producer.Watch Valley – Correspondent Jon Wertheim travels to Switzerland's Vallee de Joux – known as "Watch Valley" – where top brands have been refining the art of mechanical watchmaking for centuries. It's a curious time for luxury timepieces, which run – not on batteries – but on springs and gears, as the industry navigates the smartphone era and the ups and downs of President Trump's tariffs. Wertheim meets watchmakers and brand leaders and gets an up-close look at what keeps these mechanical wonders ticking. Nathalie Sommer is the producer.