Took my boys out to Andrews AFB in the late ‘70s to pick up my husband.
The place was pretty deserted, but the kids noticed men with rifles on the roof.
Then, inside the terminal, my youngest said “Mom! Mom! That guy is talking into his armpit!”.
Husband’s flight was delayed from landing while we watched Henry Kissinger, his wife and golden retriever disembark from a lear jet.
My uncle took me and my cousins to DC in August of 1974. He took us to the outer gates of the White House to watch President Nixon leave on Marine One. Every rooftop around there has at least one sniper on it.