LANDSTUHL REGIONAL MEDICAL CENTER, Germany -- The critical care expertise of U.S. Air Force Master Sgt. Matthew Parker, 86th Medical Squadron surgical services superintendent, was pivotal to the safe transportation of 11 multi-national and joint service members, including three ventilated critical care patients, eight non-critical patients and five attendants to higher echelons of care, all while acting in response to a mass casualty evacuation operation at Hamid Karzai International Airport, Afghanistan, on August 27, 2021.