Please join the IOP in welcoming Linda Thomas-Greenfield, United States Ambassador to the United Nations, as she sits down with IOP Director David Axelrod for a taping of his CNN podcast, The Axe Files. Amb. Thomas-Greenfield joins us just a day before President Biden convenes a virtual Earth Day summit on climate change with world leaders and will discuss the key role that climate change and environmental protection plays in U.S. diplomacy.