Maintaining the Depths
Staff Sgt Joshua Manske, 9th Civil Engineer Squadron water and fuels maintenance, climbs up ladder to exit the underground tank once he has finished his iteration of confined space entry training at Beale Air Force Base, California, April 27, 2017. Members of a confined space entry team will run through practice iterations multiple times a year to stay proficient. (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-GZ700-974.JPG