All systems are tested by NASA “Mega Moon Rocket”. Why are so many details kept secret?

NASA’s new mega-lunar rocket, the Space Launch System (SLS), is one step closer to reaching stars on Wednesday (April 6th), completing what is known as wet dress rehearsalin which the agency loaded the sides of the car with cryogenic fuel and simulated a countdown in preparation for takeoff.

While NASA broadcasts the test video live on its website, many key details of the event were kept secret, allegedly for reasons related to national security. But do most of these details really have to be secret? Here’s what we know about the agency’s decision to be so secretive, and why not everyone buys their stated rationale.

What is a wet dress rehearsal?

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