US, NATO wrap up Saber Strike 17 Pennsylvania Air National Guard Tech. Sgt. Max Langford, a boom operator with the 171st Air Refueling Squadron, refuels a U.S. Air Force Global Strike Command B-52 Stratofortress during exercise Saber Strike 17 above Riga, Latvia, June 13, 2017. Langford, along with other boom operators from the 171st ARS, refueled B-52s and B-1B Lancers throughout the exercise. Air Force photo by Senior Airman Tryphena Mayhugh SHARE IMAGE: Download Image: Full Size (1.48 MB) Photo By: Senior Airman Tryphena Mayhugh VIRIN: 170613-F-ZC075-337.JPG Photo Gallery