Oh, absolutely. 'Working up', in my mind, would be the state where pilots and aircraft are still trickling in to full strength, and the ones that are there are officially checked out on all their hardware and theoretical knowledge, but are practicing to get it completely down, and, more importantly, to learn how to work with each other and do the other parts of their job, like tactics, navigation, and so on.
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"V, did you do something foolish?"
"Yes, and it was glorious."
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"V, did you do something foolish?"
"Yes, and it was glorious."