Oh, I dunno. Consider the composition of the team: military officers and ultra-specialists in brainy fields.
THe level of reporting we read on the Serpo site is about what I'd expect from such a collection.
Not that I think it's true, one word of it. I'm just saying that I would expect any such group to produce a work about the most astonishing discovery in the history of humankind such that it would require a stiff chair and a thermos of robust coffee to get through.
I don't believe it. But, like I said, it doesn't cost to entertain the possiblity. It's great fun, and cheap entertainment.
Besides, I personally believe there are others out there, somewhere. Now if there has been contact, that's a whole different story.
I personally enjoy the speculation that we are "seeded" here, chariots of the gods type stuff.
And not that doesn't preclude a belief in God, I just don't believe every word of the Bible is to be taken literally.