Thor warheads
There has, I know, been some speculation that the Thor warheads were dummies but this is largely based on the fact that the RAF launch crews never had proof positive that live warheads were loaded. The panic that happened after the major LOX spill on a Thor at Ludford Magna seems to more than confirm to the casual observer that warheads were in place. The evidence from the USAF Authentication Officers who held the keys to arm the wraheads in the event of a live launch and the activities of the 99MMS would were the custodians of the warheads puts beyond doubt that the warheads were live.