U.S. Air Force Airman 1st Class Nicholas Santiago, with the 422nd Communications Squadron, speaks with Airman from the 100th Communications Squadron and 48th Communications Squadron about the capabilities of a High Frequency Global Communications System located at RAF Croughton, United Kingdom on August 9, 2018. Airmen from the 422nd Communications Squadron hosted the visit and emersion training as a way to share knowledge about the specialized facility. (U.S. Air Force photo by Tech. Sgt. Brian Kimball)