Harsha de Silva, the Sri Lankan Economic Reforms Minister, joins Christiane Amanpour to discuss the devastating attacks on Easter Sunday. Jack Harries, the climate activist and filmmaker talks about the Extinction Rebellion protests in London. Bill McKibben, activist and author discusses his new book "Falter" and the current threats to our species. Our Alicia Menendez talks to Amber Tamblyn, the actress and activist about growing up on screen, her new book "Era of Ignition" and the MeToo movement.To learn more about how CNN protects listener privacy, visit cnn.com/privacy