Attendees from both in and outside the Department of Defense listen to a briefing on the T-6 On-Board Oxygen Generating Systems during a conference at Joint Base San Antonio-Randolph, Texas, May 29-30, 2019. During the conference, machine and human aspects of the problem were discussed, as well as the human-machine interface as part of the on-going effort to improve the safety of the OBOGS. (U.S. Air Force photo by Senior Airman Story Archer)