Anchorage Airport dozers clean ash
Detailed Description
Dozers clean ash at the international airport in Anchorage Alaska, USA. The airport was closed for 20 hours after about 2 mm of ashfall from the eruption of Redoubt Volcano on 23 March 2009. Crews removed ash from the airport's runways with a technique that involved mixing snow with the ash on the ground and then plowing aside.