UXO stands for "Unexploded Ordnance," which refers to military munitions that did not detonate as intended. These can include bombs, shells, grenades, and other explosive devices left behind after conflicts or military training exercises. UXO poses significant safety risks to people and the environment, as they can explode if disturbed. The presence of UXO is a concern in many areas, especially in regions affected by war, such as Vietnam or Bosnia. Efforts to locate and safely dispose of UXO are crucial for ensuring public safety and allowing for the safe use of land. Organizations often conduct surveys and clearance operations to mitigate these hazards.