Capt. Jeffrey S. Feinstein, a WSO in the backseat of an F-4, achieved ace status by shooting down his fifth MiG-21, becoming the third and final USAF ace of the Vietnam War. He is still the most recent ace in Air Force history.
The Air Force Research Laboratory has signaled to industry it wants to develop a low-cost hypersonic cruise missile to deliver a wide range of payloads at a range up to 500 nautical miles.