I was reading about the technology behind fireworks displays and came across Pyrotecnico
"What do Pyrotecnico and the NASA Space Shuttle have in common? Precise timing. That giant countdown clock you see on TV during shuttle launches is connected via satellite to the Atomic Clock in Boulder, Colorado. So too are the computers that fire our shows. Our clock will count down to exactly 11pm to celebrate the opening of CityCenter with precision timing. "Big deal", you say? It really is a big deal if you need to synchronize multiple locations and media at your event like barges, buildings, stages, bridges, television stations, radio broadcasts, video projectors, lighting and lasers. You name it, we can integrate it into the show with precision."
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