Strategic Air Command would occasionally measure the work week of air crews, find out that between training activities and alert duty it was around 85 hours a week, and decide it didn't want to know after all.
And if you don't think a seven-day alert tour was 24/7 duty, you've never cocked a replacement aircraft on alert at 0100 hours in a snowstorm so that the old alert bird could make a scheduled training sortie.