Very interesting to read. You write with great ability.
A mysterious aircraft project of the US Air Force, X-37B, is a project that leaves a big question mark inside our heads.
Mysteries that blanket the aircraft from cargo, mission objectives, and test technology. I think it has not been revealed clearly until now.
About cargo, There is mention of solar energy technology and CubeSat satellite mini. I think, not a logical reason. The Air Force is still stingy and frugal in missions.
On the other hand, there is mention that electric fuel is considered more efficient than traditional fuel. In addition, fuel technology also helps technology development to control the satellite with better accuracy. Maybe this is rather logical.
On the other hand, it is considered more of a technology trial to improve US spy ability. I think logically though in the form of opinion. See the current turmoil ...
Hopefully there is technological sophistication, the perpetrators must be able to think positively about the consequences of saving the earth and its contents.