Answer: zerohour

AnswerCrossword Clue
ZEROHOURTime of action
ZEROHOURMoment of attack
ZEROHOUROperation's start
ZEROHOURWhen an attack is scheduled to start
ZEROHOURMoment of crisis.
ZEROHOURThe moment of crisis.
ZEROHOURAlmost the last minute.
ZEROHOURTime of crisis.
ZEROHOURTime for action.
ZEROHOURTime to attack
ZEROHOURMoment of truth
ZEROHOURBlastoff time
ZEROHOURDecision time
ZEROHOURShowtime, at NASA
ZEROHOURMilitary operation's start