I think Carl Sagan was kind of nominally skeptical of a lot of UFO stuff.
Carl Sagan didn't only hold some cover, possibly UFO-related meetings the public didn't know about.
Many people don't know this about Carl Sagan.
I think it takes just reading his book, watching his videos, and watching his incredible movie Contact to know that Carl Sagan knew a little bit more than he let on when it comes to UFOs.