A US Army helicopter takes off full of evacuated refugees, Longarone, near the Vajont Dam in the Piave Valley, Italy, early October, 1963. On October 9, a landslide in the dam basin caused a wave more than 800 feet high to overtop the dam and flood the valley below--five villages were completely destroyed, more than 2000 people were killed, and thousands more were left homeless and displaced. (Photo by Archivio Cameraphoto Epoche/Getty Images)
