Runway cleared! Published Jan. 15, 2010 GRISSOM AIR RESERVE BASE, Ind., -- Contractors drive side by side rollover snowplows as this method allows for the runway to be clear much faster. If the runway is icy the contractors will apply potassium acetate, which is a substance that is environmentally friendly and breaks the ice down so that it can be cleared from the runway. (U.S. Air Force photo/Senior Airman Carl Berry)
