This is a CIA declassified file, and it's not about UFOs or ETs, lol. Quite the opposite.
From CIA.gov/library documents from 1957 calling earth flat earth and discussing measuring the "firmament," the same as God called it.
That means the government knows full well we live in an enclosed containment under a dome. Space flight is limited to our atmosphere. There are no extra terrestrials or alien spaceships. It's all a lie. You've been hoaxed and you're lying with every word out if your mouths.
Do some research and wake up.
1946-1957, and before, even in the 1800s. Antarctica explorations discovered God's firmament as well as the bottomless pit of evil.
NASA, created for lies in 1947.