U.S. Air Force Col. Athanasia Shinas, 624th Regional Support Group commander shares the story of her grandfather Ralph Yeager's experience of the Japanese attack on Pearl Harbor at Joint Base Pearl Harbor-Hickam, Hawaii, Dec. 7, 2018. Yeager was stationed in Hawaii in late 1940, and was assigned to the 22nd Material Squadron, 17th Air Base Group, Hickam Field. (U.S. Air Force photo by Master Sgt. Theanne Herrmann)