Members of the 606th Air Control Squadron radio frequency transmissions section conduct training on a high frequency coupler during exercise Astral Knight 20 at Malbork Air Base, Poland, Sept. 23, 2020. AK20 enhances our professional relationships and improves overall coordination with allies and partner militaries during times of crisis.(U.S. Air Force photo by Tech. Sgt. Tory Cusimano)
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