you build your foundations. and shona goes for a walk on the wild side, but you don't know what's around the next corner. we've discovered something like 20,000 new paths in the short time we have been running the project already. have you ever wondered what happens when a satellite goes wrong? how would you know what was up? how would you find out if it had been sabotaged? that's what i have come to texas to find out. 30 seconds... we are at this 200—acre site to film a hot fire test of a rocket engine. when it first starts up, it's going to be relatively gamey, you're going to see some shock waves. oh wow. and we are going to do it in a way that even the rocket makers themselves have not done before. four, three, two, one...