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Air traffic controllers at the Utah Test and Training Range's Clover Control center on Hill Air Force Base, Utah, monitor air traffic and communicate with pilots Jan. 15, 2026. They are the unseen guardians of the UTTR, a massive sandbox of restricted airspace for the U.S. military that stretches nearly 230 miles long and 140 miles wide. From a dark room on Hill Air Force Base, filled with radar tubes and screens filled with data, these fifteen controllers manage a colossal slice of the sky. (U.S. Air Force photo by Micah Garbarino)