Nick Frearson, a scientist with Columbia University, gives visitors to a New York Air National Guard's ski-equipped LC-130 Hercules aircraft an overview of the National Science Foundation's Icepod at Joint Base Andrews, Md., May 8, 2014. The pod will allow the Guard to collect research data while it conducts supply and transportation flights throughout Antarctica. (U.S. Air National Guard photo by Senior Airman John Hillier/Released)