Popular Mechanics decided to peg some UFO overview on World UFO Day …

https://www.popularmechanics.com/space/a22025557/world-ufo-day-2018/

The magazine asks a question for which there is an obvious answer. From the Popular Mechanics article:

“Another, more plausible theory is that a secret arm of the U.S. government achieved a technological breakthrough to the point where its craft are mistaken for the work of aliens. This technology, proponents explain, is so advanced the government is keeping it under wraps. Still, if Kenneth Arnold had seen top-secret military aircraft in the 1940s, why does the U.S. military not have anything like his “flying saucers” 70 years later?”

 

Answer: The U.S. military DOES have platforms now far more advanced than those earlier saucers.