Senior Airman Johnathan Felder enters the main integral tank of a KC-135 Stratotanker while Staff Sgt. Leandro Lantigua-Menendez, both fuel system technicians of the 108th Maintenance Squadron, assists at Joint Base McGuire-Dix-Lakehurst, N.J., Aug. 29, 2019. Felder acted as the entrant for an exercise that tested the rescue methods of all emergency parties involved in a confined space emergency. The expectations of the exercise was to ensure that proper safety and rescue procedures were followed by the 108th MXS and 87th Fire Department. (U.S. Air National Guard photo by Airman 1st Class Andrea A. S. Williamson)