FORT SILL, Okla. -- Sgt. 1st Class Andrea Garza takes the first bite of the Air Defense Artillery birthday cake before giving a piece to Pvt. Harley Nippe (wearing glasses) during the Fort Sill, Okla., 45th ADA anniversary celebration June 20, 2013 at Kerwin Auditorium. Garza, a Patriot (missile) Advanced Individual Training platoon sergeant, is the oldest Soldier at the 3rd Battalion, 6th ADA. Nippe, 18, is the youngest Soldier and an AIT Patriot student in the battalion. 3-6th ADA Commander Lt. Col. Shaun Lott (far left), and Command Sgt. Maj. Lawrence MacDonald, battalion CSM, participated in the festivities.