Lazar never told his friends/family the truth, that they were seeing the effects of a proton beam. Lazar spun his crazy saucer story to them, in his mind thinking that as long as he wasn't revealing what they were actually seeing, he wouldn't be violating security (setting aside for the moment he was bringing visitors to observe classified tests).
The people Lazar brought out to see the tests became his most ardent supporters and defenders, because, hell, he showed them flying saucers and called the days they'd show up. That's pretty damn convincing. Alas, in a familiar pattern, they were played for fools. I suspect, but do not know, that some of this group may now know the truth. But they didn't then.
So, April 6, 1989…..It all comes crashing down. Security discovers our little band of partiers and Lazar bolts into the desert. It's starting to sink in that he could be in some serious shit. The Lincoln County Sheriff later questions the merry makers and lets them go, but they had Lazar's ID and he knew word would quickly get back to Groom. Uh oh….he could be looking at serious jail time.
The next day Lazar is summoned to the Indian Springs airfield and the full force of the Groom security apparatus is directed at him. He now realizes how close to jail he is. His only defense is that he didn't tell his comrades what they were actually seeing, but rather it was a made up story of flying saucers.
This, of course, doesn't go over well with the security guys, but they are somewhat stymied. Their choice is, do they prosecute this guy and draw further attention to Groom's operations, or just kick him out and intimidate the hell out of him to get him to speak no further? I guess, in hindsight, they picked wrong.
Unbeknownst to the Groom guys, Lazar's tale to his friends cast him as the hero against a hopelessly inefficient, secret government bureaucracy. Their rallying around him and support emboldened him, eventually granting interviews to KLAS due to John Lear's urgings. Lazar also may have viewed that action as insurance, heightening his profile, should Groom security decide to come after him again. But it required him to fully double down on the alien saucer tale he had wove.
Not a bad gig, really. Some minor celebrity and attention, along with occasional paid interviews. And he maintains it to this day, because, well…he has to. It keeps him out of jail. I'm certain the Feds have a long memory when it comes to Lazar and would love to get even for him trashing Groom's abilities to run secret operations.
So that's what really went down, more or less. No saucers, just a really neat proton accelerator and a guy spinning a crazy story to stay out of jail.