Yet another article about the recent UFO revelations:

https://www.bostonglobe.com/news/nation/2017/12/17/are-ufos-real-the-pentagon-tried-find-out/3T77zzg5lIbA3qIRvA21cI/amp.html

From the article:

But Elizondo said the only thing that had ended was the effort’s government funding, which dried up in 2012. From then on, Elizondo said in an interview, he worked with officials from the Navy and the CIA. He continued to work out of his Pentagon office until this past October, when he resigned to protest what he characterized as excessive secrecy and internal opposition.

There is one very plausible explanation for this “internal opposition” to the program: It threatened to expose a 70-year-old conspiracy in which the U.S. military has built and perfected a fleet of above-top-secret field propulsion vehicles.

It’s all in Flying Saucers.