It's a great shot, sure, but that first bit looks like one take, and then the one with the rocket is another. The rocket thing is simple, before the launch you say the line and time how long it takes, then when the launch goes through, you time starting your line with the public countdown. You'll need luck that the countdown continues as planned, but this bit, unlike the launch, is not exactly rocket science....
Was this all one take? The cut before the rocket makes seem, and sound like a cut in. Still a great clip, no doubt, but I wonder if it was just a 20 second section that they started 10 seconds before the countdown.
Yeah yeah great shot and all, but "the moon or Moscow, the planets or Peking"? No more cold wars. Militarism sucks, and scientists should work to further life, not nationalism and the military industrial complex