The historic countdown clock at @NASAKennedy was considered one of the most-watched timepieces in the world, and is a few miles west of historic pad 39A. For the record, T-0 (“T minus zero”) generally indicates the moment of liftoff, but not necessarily the time that the engines ignite. The Apollo Saturn V launch sequence listed engine ignition at T-8.9 seconds. The Shuttle main engines started at T-6.6 seconds, launch thrust at T-3 seconds and booster ignition at T-0. T minus zero is actually referred to as “an action or event that results in a substantial change in the amount of control you have over a situation.” There’s your business metaphor for the day.