Bucket of Sunshine Question - Yellow Sun
Not OpSec (in my opinion) just in case you were concerned.
Some time around 1956, the UK being somewhat backed into a corner in terms of weapon development due to the McMahon act and the resultant lack of US cooperation (until it was repealed in 1958) and needing a Megaton range weapon, came up with what is arguably the worst nuclear weapon design in history, the Green Grass device. Installed in either a Yellow Sun or Violet Club casing this bomb had so much fissile material fashioned into a thin outer shell combined with a large central void, that any simple collapse of the shell could potentially result in a prompt critical reaction and a partial detonation, even without a neutron initiator. In other words simply dropping it off the cradle could potentially remove an RAF base from the map. The RAF were given 5 of them, and they regarded that as 5 too many.
As a safety feature the central void of the bomb was filled with ball bearings which were held in place by a simple plastic plug, when removed the ball bearings trickled out into a large bucket and the bomb was technically armed or at least "dangerous". This process apparently took around 30 minutes unless it was freezing, in which case they would often lock together and refuse to budge, and technicians were understandably loathe to hit the casing with a hammer.
It's a long time ago, and with only 5 of the nightmarish things ever made this is something of a stretch, but did anyone on V Force ever come across one of these cold war terrors, any tales to share ?