One of the most famous and credible whistle blowers on the subject of ET spaceship technology in possession of a black project military installation S4. Debunkers will simply focus on his lack of school credentials and dismiss the many supporting pieces of evidence for Lazar's story.
The S4 facility in the mountainside about 10 miles south of "Area 51" where Lazar worked focuses on the alien ships and aim of reproducing the technology. There is another (underground) facility called dulce mesa in New Mexico which allegedly focuses on the biological and genetic study of aliens recovered, including genetic engineering and breeding experimentation.
One thing that Lazar states in both the 2014 and the OpenMinds interviews is that he was shown a candle that when placed close enough to the anti-gravity device of the alien ship, would freeze the candle flame in place! The emission of light and basically atom activity paused!