Maintaining the Depths
Senior Airman Charles Burkhardt, 9th Civil Engineer Squadron water and fuels systems maintenance, dons personal protective equipment before he enters a confined space during a training exercise at Beale Air Force Base, California, April 27, 2017. PPE for confined space entry can include a full body suits, safety harnesses, rubber boots, gloves, oxygen tanks and gas masks. (U.S. Air Force photo by Airman 1st Class Justin Parsons/Released)

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Photo by: Airman 1st Class Justin Parsons  |  VIRIN: 170427-F-GZ700-023.JPG