Kathrin Ryan promoted to Senior Airman Published Jan. 15, 2009 By 010109 1.13.2009 -- CHEYENNE, Wyo. - Kathrin Ryan, of Thornton, Colo., was recently promoted to Senior Airman in the Wyoming Air National Guard. Ryan is assigned to Medical Supply in the Wyoming Air National Guard's 187th Aeromedical Evacuation Squadron and has been a member of the Wyoming National Guard for two and a half years. Besides serving in the Wyoming National Guard, she is a student at the University of Wyoming, in Laramie.