Flight Test Air Force Maj. Zachary Probst and Air Force Maj. Christopher Dupin from the 40th Flight Test Squadron, fly a B-61 GTV7 mission at Eglin Air Force Base, Fla., July 6, 2017. B-61 is a tactical nuclear weapon tin the Air Force armament as part of the U.S. nuclear triad. SHARE IMAGE: Download Image: Full Size (0.03 MB) Photo By: Air Force Staff Sgt. Brandi Hansen VIRIN: 170706-F-JB022-001C.JPG Photo Gallery