A retired serviceman in his Seventies recently joined in with some other elderly tourists who decided to not be food, fighting back against a trio of armed muggers which held up their tour bus in Costa Rica.
He put one of the young miscreants into a headlock, snapped his clavicle, and sent the other two fleeing. The hoodlum died at a hospital, and police are looking for the other two.
The local constabulary has no plans to file charges against the tourists, recognizing their right to self-defense.
It's not the weapon, it's the mindset.
Oh, and I don't know the service branch of the retired serviceman, but I have a pretty good idea...