Anote Tong, former President of Kiribati, and Aliza Ayaz, climate activist and UN Youth Ambassador for Sustainable Development Goals, join Christiane Amanpour to discuss the very real effects of the climate crisis in Kiribati and Pakistan - and what might change now the U.S. has rejoined the Paris Climate Accord. Actor Steven Yeun discusses his new film "Minari" about a Korean family trying to build a new life in rural Arkansas. Our Walter Isaacson talks to billionaire philanthropist Bill Gates about the pandemic, the climate crisis and his new book "How to Avoid a Climate Disaster".

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