(L to R) Lt. Gen. (Ret.) Mike Short; Lt. Gen. Sid Clarke, Air Forces Northern (AFNORTH) commander; and Canadian Brig. Gen. Chris Coates, U.S. Continental North American Aerospace Defense Command (CONR) deputy commander, share a discussion during the Ardent Sentry 12 exercise. In his role as senior mentor during AFNORTH’s participation in the exercise, General Short observed and shared lessons he learned during his career in command positions with General Clarke and members of the staff.