They are fallen angels.
I'm sure Russia has them too, but US has electrogravitic/electrostatic craft, and has had them for eons. There is a book about T Townsend Brown which confirms his employment by the CIA, and also a supranational "Secret society" of "Eminent" intellects called the Caroline Group. There is disinfo in his authorized biography because it talks about time travel, which cannot happen. At any rate Brown was onto some of the principles, and got pulled into the USN to do experiments on something called sidereal radiation, something like cosmic radiation. They took measurements off destroyers, and subs. He was also involved in the Philadelphia Project, which is shrouded in lots of disinfo. Brown had made a flying disc that ran off of capacitors while at Caltech, and got laughed at.
Tesla also had a flying device he was working on. If you look at the history of quantum mechanics it is scientism at its best. High level math became a substitute for observability, and experimentation so in effect saying a thousand blue monkeys with nose rings turn little cranks which go to a crankshaft turning the axis of the earth would be accepted as the new vogue theory in academia if you could "Prove" it mathematically. Quantum mechanics is built largely on speculative math. But, there is a reason why.
There is something called the luminiferous ether which permeates everything. It is basically energy that exists in the same space as matter. The fluctuations in this are probably what T Townsend Brown discovered in sidereal radiation. Post WWII aviation trade rags talked about a new era of commercial air travel with electrogravitic craft. Then all of a sudden references to this technology stopped. Nick Hunt, a Jane's Defense writer explains this in his book, The Hunt for Zero Point. At any rate the tech went deep underground, as well as the correct physics at the behest of the national security apparatus. So America has mastered the straightforward science behind this, and weaponized it.
On a side note the Germans had a secret society of rich people pre WWII that was lead by some blonde foid who "Channelled" working instructions for these craft from "Ascended" beings. Fallen angels.
That is what aliens are. They are angels which rebelled against G-d, and have been decieving mankind ever since with false spiritual concepts, and new age garbage. Just look at the things abducties say about what these beings tell them.