A few years ago, we drove (basically) se on keene rd in richland wa at about 50 mph (speed limit 45) on an early summer afternoon.
wife said “what’s that thing?” so far, no other reports… but, we live in the economic realm of the us hanford nuclear reservation (we’re retired).
saw something somewhat less than 50 ft long and maybe 20 ft tall hovering/rotating (ccw from above) about 20 feet above a light pole on the s. side of the street. at first, thought it might be an ad blimp.
before we went below, it took off; it rose and rose toward the ne and progressing at approx 45 degrees horizontal away from us, it left us significantly behind (it went well over 70 mph, quickly… blimps don’t do that.)
it didn’t have all normal flight control surfaces: no wings, no horizontal stabilizer, no propellers, no jet inlets nor nozzles.
it did have a fairly tall vertical stabilizer. along its lower edge and behind its blunt nose it had a series of varying (vertically) slits that may have been either vents or (small/narrow) windows aligned to its sides.
have been long waiting to hear from others, but no. will provide sketch if interested.