There was a great British TV series about British explosive ordnance teams in England during WW II, called "Danger: UXB". They went to great pains to explain that enlisted men were not permitted to attempt to defuse unexploded bombs, only officers could do that. But the enlisted were required to dig the bombs out so the officers could work on them.
As the war (and the series) progressed, the British officers were sent straight from OCS to the UXB course, sidestepping their chosen specialty training...No sense training them to be quartermasters if they were sent to UXB and then blown up by an unexploded bomb...
Fascinating background material in the series...How the Germans improved the bombs so that they couldn't be defused quickly or easily...and time delay bombs...designed to blow up the UXB/first responder teams...