The Effect of Retreating Glaciers on Volcanoes

Georgia Republican Rep. Marjorie Taylor Greene, nicknamed MTG, isn’t afraid to share her opinions, no matter how intense and in-your-face they are. She sits down with Lesley Stahl. Following his testimony before two Senate committees this week, United States Secretary of Homeland Security Alejandro Mayorkas talks with Sharyn Alfonsi. They discussed the record numbers of migrants trying to cross the U.S. border with Mexico and why he refuses to describe the situation there as a “crisis.” Bill Whitaker explores the discoveries Icelandic scientists have made in forecasting eruptions like we forecast the weather and could apply to similar volcanoes in the United States, Japan, or Russia.

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