Maybe read the whole article? It’s pretty simple though. Millions of dollars have been invested into a government program researching UFO’s and UAP’s. There are confirmed existing spaces in Vegas, which storing materials recovered from “unidentified aerial phenomena” with unknown origin per government funded research.

The topic of UFO’s inherently involves the possibility of off world origins. Bottom line, they’ve been researching this for a long time and cannot confirm or deny that UFO’s are man made. The presence of secret debris and materials from UFO’s implies potential “evidence”.

Hence why I also stated “That ✨might✨ not necessarily be the case or at least can’t be necessarily ruled out”. So I’m not saying it’s a sure thing, but there is physical “evidence” that has not been confirmed to be non extraterrestrial. Therefore it can’t be ruled out to be “otherworldly”. It’s just a possibility…but let’s be real, l’m sure they know.