Dara Massicot discusses what new weapons allowances by the U.S. for Ukraine will mean for the war. Climate expert Johan Rockström explains what is happening at the COP29 climate conference. Journalist Bel Trew explores the lives impacted by the Dobbs decision in her film "The A-Word." Ken and Sarah Burns discuss directing "Leonardo da Vinci," a deep dive into the life of the famed painter.