HVAC upgrades at gym
A new heating, ventilation and air conditioning system sits above the basketball court in the Maxwell Fitness Center, March 2, 2017, Maxwell Air Force Base, Ala. In total, 11 new HVAC systems have been installed at the fitness center with two more scheduled to be installed at a later time. (US Air Force photo/ Melanie Rodgers Cox/Released)

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Photo by: Melanie Rodgers Cox |  VIRIN: 170302-F-EX201-1005.JPG