X-Ray Earth reveals that the Atlantic island of La Palma has collapsed several times in mega-landslides. Another collapse could trigger a tsunami with enough power to cross the Atlantic Ocean and decimate the U.S. East Coast. Now scientists race to understand what could trigger the tsunami - and just how devastating the catastrophe could be.

Originally released by National Geographic, 2020. Streaming video file encoded with permission for digital streaming by Infobase on January 05, 2023.