Ping!
Methods for steathy approach & parasitically attach to and steal the take of enemy birds..?
I hope so.
*BEEP* “Mission Control, re-entry system has failed. Switch to Plan B reporting:
US Military Space Plane Wings Past {$DAY = $DAY++} Days on Latest Mystery Mission
One of its tasks just had to be checking for neutron leakage from the two North Korean satellites.
In fact this sort of task is probably the main reason it was constructed.
EMP
Searching for PLANET X, PANIC!
It's stealthy but not stealthy enough that the guys at Heavens Above can't keep track of it. At least until it decides to disappear.
https://www.heavens-above.com/orbit.aspx?satid=39025
https://www.heavens-above.com/PassSummary.aspx?satid=39025
And when it vanishes they get all giddy, like kids on an Easter egg hunt, vying for the bragging rights of being the first to locate it when it reappears.
The mysterious X-37B: What's the Air Force's mini-shuttle all about? Sept. 6, 2017
The X-37B flies in low Earth orbit, up to about 250 miles high, and can stay there a long time.
Low Earth orbit does not make this a "space plane" or "space vehicle".