Swiss glacier collapse: 'You can't engineer yourself out of something of this magnitude'

A huge mass of rock and ice from a glacier thundered down a Swiss mountainside, sending plumes of dust skyward and burying nearly all of Blatten, an Alpine village that authorities had evacuated earlier this month as a precaution. The devastating landslide is focusing renewed attention on the role of global warming in glacier collapses around the world. For more on how glaciers collapse, from the Alps and Andes to the Himalayas and Antarctica,