NASA‘s launch of the Ares I-X, the experimental prototype of the new launch vehicle. Pay special attention to around 0:45 into the video and look at the USS (Upper Stage Simulator) – where you can see the effects of the Prandtl-Glauert Singularty, where the sudden massive drop in pressure in the cone of the sonic wave causes water to condense out of the air into a visible vapor cone! Here’s to returning to the moon!