Training use only
Airman 1st Class Elijah Simmons, 92nd Maintenance Squadron, Aircraft Fuel Systems Squadron apprentice, prepares to enter a fuel tank training module, a section of a former KC-135 Stratotanker wing, during a training session at Fairchild Air Force Base, Washington, Nov. 21, 2017. Fuel leaks on an aircraft can be a disaster mid-air or prevent an aircraft from possessing enough fuel pressure to even take off, making it a critical part of maintenance. (U.S. Air Force photo/Senior Airman Ryan Lackey)