Thoughts on Phoenix Lights and any Nighttime Triangle including Belgium/NATO headquarters... this is a bit of a rant with excitability included... I don't have time to edit and tone it down... I do apologize, seriously.
IF Humans can do it, THEN it is likely Humans did do it.
1) Is there any Human or Human Group or Security or PSYOPS Warfare or Money Making MOTIVE to do it?
2) Is there the OPPORTUNITY and ability to somehow do it by Humans?
IF 1, 2 are likely true above, then the ONLY remaining answers "unknown" are WHY and HOW the Humans are doing it. It's really never very difficult to figure out the why and how [at least] in a general real technology/science possibility sense...
Why = Military Reasons, Covert Black Ops, Public Reaction Testing and Displaying, Money Making, Hoaxing, Grandstanding, PR for some media/entertainment group -Hollywood, Cult-ish Bizarre Reasons, Criminal, Sociopathic, Billionaire toys.
How = Out of the Box Solutions! It's 'not' a damn ET-UFO, but something that MIMICS ONLY 'specific' attributes or concepts of an ET-UFO. When done at night, this means its some kind of Magic Show. Magic Shows fool Size, Movement, Shape, Radar Tracking, ETC. Examples: Phoenix Lights and Belgium were probable Magic Shows. Flares were "a cover" for a real human PSYOPS ET-UFO -BUT the Human triangle craft was created either by 3d Projection Hologram(s) and/or by Real Light-Air Based Aircraft. Some combination. Radar tricks [electronic warfare] and/or aerial decoys in Belgium faked the speeds and movement of that triangle. Geesh guys/gals, it was NATO Headquarters!!!
More triangle reasoning... and REAL Possible Connection to Hollywood for the Phoenix Lights too...
These are high altitude platforms that have a light-air component to go high or low. These are the giant triangles. Some may be a hollow tinker toy triangle frame, possibly using holography to "shape shift" and project, and others have a lightweight skin around the skeleton. The inside of the frame may have a framework to support whatever it's being equipped with.
The somewhat see-through skin, think movie screen, may be back-lighted to glow colors or use camouflage coloration to blend in the clouds or sky. The newer tech ones have something like you have on your high-rez LED screen, but it is a thin lightweight flexible skin to conform with the craft.
Those huge Black Triangles are using this cloaking concept too. One eye witness in Phoenix reported when the triangle flew over he saw the stars "through the object" BUT the star sky appearance had a heatwave effect too. He said what looks like you see coming off a hot road. This could have been a PSYOPS test over a populated area to study its effect. Then the military drops flares later to cover-up the PSYOPS test.
Anyway, the triangle high-altitude platform makers are/were in the New York or Hudson Valley area. It seems this is where these were first spotted in the early 1980's.
I'm interested in the projection of 3D imaging too either by projected invisible laser or light beams or the actual firing on aerial objects designed to light-up and move across the sky. Billions are spent on "Star Wars" for decades now, so surely this could be a good use of such weaponry to fool humans and radar!
I do want to add the possibility of even Hollywood playing some connection with the Military too in connection to the Phoenix lights. That is, the year before was the movie Independence Day, which made a ton of money, AND just a few months later *after* the Phoenix lights the movie Men in Black was released and made a LOT more money. I swear, I would not put it past the Military to try a PSYOPS mission as a "test case" to get a reaction from that sighting over Phoenix. I wouldn't even put it past Hollywood to be involved in it somehow to boost PR for these movies. What better timing at least for a PSYOPS mission??? (Especially, if many believe ET is here already it could be "a probe" to study the reaction.) Anyway, these large triangle craft seem to have some light-air aspect to these, so it could have the ability to inflate & disassemble too.
These same type of craft have been seen before too... also doing a lot of hovering and slow movement in those early 80's sightings I mentioned. Listen to the interview at Open Minds "Linda Zimmermann - Hudson Valley UFOs - June 2, 2104" ...in there she gave an account of huge "tinker toy" triangles. Imo, light-air tube-frame tests with disassemble design. Inflatable skin for full triangle shape. More large triangles were seen fully skinned hovering for long periods. I believe these are the prototypes to these Phoenix/Belgium craft begun to be seen in the early 80's. Supposedly, 1000's or more people saw these craft over a period of time in the NY area she notes in that interview. This is the R&D source and initial testing. Phoenix was a PSYOPS test and Hollywood loved it too!
Another possibility??? below...
A well known skeptic on a recent Paracast show said the huge triangle craft that came from Nevada down to Tucson was a formation of A-10's using bright formation lights AND that was BEFORE the flare show, a separate event, later on. This could explain the one eyewitness account for the see-through wavy effect on the giant triangle in Phoenix, but I would think a formation of A-10's would make plenty of jet engine sounds. A-10's don't use any sound stealth technologies, so WTF? What altitude and distance would the A-10 formation have to be to remain somewhat silent considering ground city noise?