NICAP says bugs. Anything that moves 21,000 KPH would make a tiny little bang in the air. Say enough to flatten Denver.
So, if "bugs", I'd be curious as to type?
Doesn't look like any "bug" I've seen, and as a gardener, I've seen more than most folks.
As for the 21,000KPH + "flattening local terrain"; I'd encourage getting hands upon and reading; "Unconventional Flying Objects - a scientific analysis" - Paul R. Hill; ISBN: 1-57174-027-9 ;
" To the degree that the engineering characteristics of UFOs can be estimated by empirical observation, in this reviewer's opinion the above-referenced, recently-published book by Paul Hill provides the most reliable, concise summary of engineering-type data available. .... "
That wasn't a UFO; that was Obama flying in to make a speech.
Are you a believer in the possibilities of extra-terrestrial life? (Not a trick question)
Pull out your dictionary and look at the definitions of ;
and note descending order of occurance.
Given ashured/assumed Universal nature of Chemistry and Physics, "possibility" over the range of the Cosmos/Universe looks to be 99.99999...%
Start talking about a given planet, orbiting(or not) about a given star and we're down a scale or so into "probabilities".
Start looking closer to details, like timeline of the stellar/planetary system in question, finer detail of the world/planet in specific and we've dropped another notch or so into "plausibilities".
Now not trying to deflect by splitting hairs here, but in addition to factors above; "life" (even at it's most rudimentary) is one thing, but "Life", developed to the scale of technologies and inter-stellar travel is a much finer and likely less common event.
Bottom line, your question, vague and grossly diffuse as it is, doesn't really address the more finite positions of could, highly possible extra-terrestrial life have evolved far enough (higher probability) to develop technologies capable of practicable inter-stellar travel (plausibility), such as to have visited here in past and/or current times?
Slicing and dicing aside, my personal opinion leans affirmative about the whole way through that sequence.
BTW, thinking this might be material for another thread topic.
Whiskey for my men, and beer for my horses.
TANSTAAFL = There Ain't No Such Thing As A Free Lunch Bock's First Law of History: The Past shapes the Present, which forms the Future. *
by Airman 1st Class R. Alex Durbin
633rd Air Base Wing Public Affairs
10/23/2012 - JOINT BASE LANGLEY-EUSTIS, Va. (AFNS) -- The grainy film showed a round ship floating out of a hangar. Its silver, aluminum exterior glinted in the sun as it hovered a few feet off the ground. As it glided over a pool of water, it kicked debris into the air and the glass canopies of the two cockpits were showered with grass and gravel as the saucer flew forward.
It may seem like a scene out of a classic Hollywood blockbuster, but the footage is documentation of testing held by the U.S. government on an experimental aircraft. This prototype, and fascinating piece of American history, sits on display at the National U.S. Air Force Museum at Wright-Patterson Air Force Base, Ohio, and another resides at U.S. Army Transportation Museum at Fort Eustis, Va., where plans are underway for its restoration.
With its round design standing at nearly five feet tall and 18 feet wide, the Avro Canada VZ-9AV Avrocar looks like something out of a 1950s science-fiction film. While it may look like something a martian would fly, the Avrocar is anything but science fiction.
Newly declassified documents concerning the Avrocar project were released Oct. 8, when they were published by the U.S. National Archives. Information about the aircraft has been available for years, but the documents now include diagrams that clearly demonstrate the scope of the project.
"The Avrocar was a good start, and the first step on a long road to discovering technology we use today," said Jeff Underwood, National Museum of the U.S. Air Force historian. "Although the project was never implemented, it serves a successful teaching tool."
The Avrocar was the result of a Canadian effort to develop a supersonic fighter-bomber, capable of vertical takeoff and landing, in the early 1950s. The Idea of what was to become the Avrocar was originally envisioned by British Aircraft designer, Jack Carver Meadows Frost.