Aug. 16, 2017 375th AES from Scott takes part in Exercise Mobility Guardian Joint Base Lewis-McChord, Wash. -- More than 3,000 U.S. service members and international partners took part in Exercise Mobility Guardian, which concluded Aug. 12.Two of the participating units were the 375th Aeromedical Evacuation Squadron from Scott Air Force Base, Ill., and the 156th AES from