Ground crew hose down a large Air Force aircraft during a routine flight-line washdown. Exterior cleaning was a regular part of maintenance for aircraft based at forward and stateside airfields, protecting metal skins from corrosion and keeping aircraft mission-ready. The tail marking 'AF 42-05...' identifies this as an aircraft built under a 1942 wartime production contract, still serving years after the end of World War II. Project: 218929