Gen. William Fraser, left, head of the U.S. Transportation Command, presents 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.