Was there ever any time when more persons were employed in the United States in the space industry (spacecraft), than the aviation industry (aircraft)? Please include manufacturing and support, but do not include end-user organizations (i.e. not airlines, military, or NASA).
(If it happened, my guess would be during the Apollo program.)
Update: Most companies -- including nearly all of the largest companies -- deal in both sectors rather than just one or the other. The distinction within a company would need to be made by what is being sold. I don't expect this question to easily be answered by public on-line information, but there may be enough information in the trade press to answer it.
It's possible that this question can be answered at a later date.