Answer: countdown

AnswerCrossword Clue
COUNTDOWN12-31 recitation
COUNTDOWNCanaveral arithmetic.
COUNTDOWNCanaveral procedure.
COUNTDOWNMissile launching procedure.
COUNTDOWN10, 9, 8, etc.
COUNTDOWNPrelude at Kennedy.
COUNTDOWNPre-launch routine.
COUNTDOWNNASA arithmetic
COUNTDOWNActivity preceding liftoff
COUNTDOWN"The Final ..."
countdownThe final moments before a significant event and the procedures carried out during this time
countdowna descending count or counted check to a moment of happening regarded as zero
countdownA digital display that counts down
countdownAn act of counting numerals in reverse order to zero, esp. to time the last seconds before the launching of a rocket or missile