A Dangerous Glacier Grows Inside Mount St. Helens' Crater

A precarious glacier in the crater of Mount St. Helens grows at an unprecedented rate, posing potential danger to the valley below. A group of adventurous researchers visits the crater to investigate and gets a rare up-close look at the odd co-existence of glaciers, boiling rivers and steam vents that are reshaping the landscape at a rapid pace. Originally broadcast in 2004.