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And, the metals needed to make them came from anywhere they could find it.
https://www.reddit.com/r/ABraThatFits/comments/a6i9es/the_bra_became_popular_bc_of_steel_shortages_in/ or https://www.npr.org/2014/08/05/337860700/bra-history-how-a-war-shortage-reshaped-modern-shapewear

Originally Posted by abisel

A bit off topic, but... During WWII in 1944, all the companies that were producing combat and support aircraft delivered 96,270 aircraft. That is 264 aircraft per day. An outstanding accomplishment even by today's standards.

https://en.wikipedia.org/wiki/United_States_aircraft_production_during_World_War _II