system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How can they unscrew the fuse from a WW2 bomb that was rotting under the ground or in water for 80 years, when you may have to use brutal force, heat, etc to remove bolts from a 10-year-old car (and the bolt will snap anyway)?

I would expect that you wouldn’t be able to loosen anything on an old, rusty bomb, especially that it is so unstable and can go off anytime.
gpt
They don't, they detonate them. 

Most disposal teams will evacuate the area, pack it with explosives and sand bags, then detonate the bomb from a safe distance.

Some might be moved to a safer location to be detonated.