JOINT BASE ELMENDORF RICHARDSON, Alaska -- Timothy P. O'Brien, Alaska's assistant adjutant general for air and commander of the Alaska Air National Guard, receives his oath of office from Maj. Gen. Thomas Katkus, Alaska's adjutant general, at a promotion ceremony here March 2, 2014. O'Brien is responsible for ensuring the training and equipping of the approximately 2,200 men and women of the Alaska Air National Guard. National Guard photo by Tech. Sgt. Jennifer Theulen.