Keywords: 140124-F-SN009-040 (12234808583).jpg U S Air Force Airman 1st Class Ross Keserich a firefighter with the 374th Civil Engineering Squadron performs hydraulic ventilation Jan 23 2014 at Yokota Air Base Japan Hydraulic ventilation is a technique used to ventilate heated gases from the inside of a facility DoD photo by Airman 1st Class Meagan Schutter U S Air Force/Released https //www flickr com/photos/39955793 N07/12234808583/ 140124-F-SN009-040 2014-01-24 14 32 https //www flickr com/people/39955793 N07 U S Department of Defense Current Photos PD-USGov U S Department of Defense Current Photos https //flickr com/photos/39955793 N07/12234808583 2016-09-03 07 32 03 United States Government Work Yokota Air Base United States Department of Defense |