It's a mystery to me still that the decision was never applied to the V-Force.
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A contemporary advert was that you could be a flt lt, V-Force captain at the age of 23. While the responsibility was awesome, 4 individuals, a million pound aircraft, and a megaton weapon, there was not the same down-route responsibility of the transport driver. The latter were presumably much older too. I know a fair number of 10 pilots came from the V-Force.