English: "The picturesque, but snow-capped volcanoes, composing the Islands of the Four Mountains in Alaska's Aleutian Island chain look suspiciously like an alien world in this August 2010 image from the ASTER camera aboard NASA's orbiting Terra satellite. The islands contain restless Mt. Cleveland, an active volcano currently being watched to see if it emits an ash cloud that could affect air travel over parts of North America. A close look at Mt. Cleveland, seen near the image centre, shows red vegetation (false colour), a white snow-covered peak, a light plume of gas and ash, and dark lanes where ash and debris fell or flowed." - NASA