What is "countdowns"

Usage examples of "countdowns".

Pentagon-and-Kremlin countdowns, terrorist or rogue-leader nail-biters, love and pain in the postapocalyptic tundra.

The bridge gang went through individual countdowns and checklists, their voices and those from the intercom overlapping.

Commands and countdowns were conveyed to him over an amplified address system he could not see, loud enough for him to hear through the padded silencers which someone had thought to place over his ears.