Zero hour 3


1.

the moment when an attack was to begin. (Originally, this term was used in World War I. In these years of the Age of Space the “countdown” or rather “the end of a countdown” has pretty much usurped the role formerly played by zero hour.

 
  1. COUNTDOWN. - JEFF.IN V-11 N-3 62-0909M 103 066
   

You know, when John Glenn sat there that morning, they were listening to the countdown. "Ten, nine, eight, seven, six, five, four, three, two, one, zero." See? And now he's got to a spot to where it says, "It's three minutes till something's going to take off." They don't know what it is. "Three minutes until we have the zero hour."

 

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