TIL that the UK's Violet Club nuclear device was so unstable that it required the core to be filled entirely with half a ton of ball bearings to prevent accidental detonation

https://en.wikipedia.org/wiki/Violet_Club
#til #todayilearned
https://www.reddit.com/r/todayilearned/comments/1gkke28/til_that_the_uks_violet_club_nuclear_device_was/