Voting period is over. Please don't add any new votes. Voting period ends on 5 Jul 2016 at 23:02:13 (UTC)
Original – Sound suppression system to dampen acoustic vibrations from the Space Shuttle Main Engines. Without this system, the shuttle could experience destructive vibrations.
Reason
High image quality, captures the size of humans relative to the massive flow rate of water on the pad, rare test, image is well composed. It has a free use license, per NASA policy.