NOVA Volatile Earth Volcano on Fire and Volcano on the Brink DVD

In this two-part NOVA special, an intrepid team of volcano experts leads a daring expedition to reach the Virunga Mountains in East Africa, two of the world s most dangerous, spectacular, and least understood volcanoes. And, join a team of volcanologists as they explore one of the world's most active and mysterious volcanoes in central Africa: Nyamuragira. What feeds its frequent eruptions? And what are the other hidden dangers?