The dummy point. I think the first US device to be handled by aliens was BAOR/Corporal F SSM, 1957. Warheads were held on a US Army base at Dortmund. Thor warheads were held at USAF base, Lakenheath. US Army Jupiter IRBMs in Italy and Turkey were on the same dual-key scheme, warheads held in US custody, on nearby US bases. Genie AAMs on RCAF CF101, same; NATO Forces' M109/110 howitzers' nuclear shells, Atomic Demolition Munitions...same.
We see in Museums inert training rounds of, say, WE177. May I suggest that day-to-day exercise-use of all this ordnance employed ballast that was electrically+fit/form representative..but not in function. Might the real things, needing temp/moisture/vibration cosseting, seldom sally forth from their snugly-guarded vaults? Deliberate ambiguity. Doesn't mean they were not available at some hours' notice.