Yes
I am sure the military know of more then you could possibly dream of and it is better that way cuz somethings you just don't need to know.
Don't be afraid. Most countries of the world
have excepted this fact. As time and generations progress,
so will the U.S. Its sad that most have been taught
to fear the unknown. It is both good and bad.
It separates us even more. This too will change.
We would be in error to count every UFO as an alien spacecraft, but there is certainly cause to think that any such encounter would be concealed from the public by the "powers that be".