U.S. Air Force Gen. William Fraser, left, head of the U.S. Transportation Command, presents U.S. Army Capt. Christina Shelton, commander of the 331st Transportation Company (Modular Causeway System), 24th Transportation Battalion, 7th Sustainment Brigade, with a Joint Service Achievement Medal during a ceremony held on Fort Eustis’ 3rd Port, April 9. She was in command of the 42 soldiers who embarked to Antarctica in support of Operation Deep Freeze. (U.S. Army photo by Sgt. Edwin Rodriguez/Released)