One of the objectives you can get is to kill a certain number of a specific type of enemy "without a weapon".
I have had this challenge before, with Radroaches, which wasn't so bad. However generally, if one guy in the room had a weapon, it didn't count.
However now the challenge is Deathclaws.
How am I meant to achieve this?
Edit: to clarify; would I have to remove weapons from all dwellers who might come in contact with the Deathclaws (which would likely be my entire vault), or does it only count as killing them (i.e. dealing the "final blow" so to speak) without a weapon?