Duncan passed away October 4, 2022 at the Weatherly Inn in Tacoma. After attending Williston Academy in Massachusetts, he graduated from Lehigh University and received a Master’s degree from USC. He entered the Army and served 28 years as a senior aviator and advisor. He was a loving husband to Joan for 66 years and father to Elizabeth (Betsy) Yohai, (Steve), Meredith Blackwell (Lyndon), and Peter Duncan Cook. He cherished his grandchildren, Rachael Yohai and Ryan Blackwell. In lieu of flowers, please make donations to LCOP or the charity of your choice. A memorial service will be held at Little Church on the Prairie on Oct. 21 at 2pm.