In 1971, I was seconded  to work for a few months  in a American electronics company near San Francisco, and needed, of course, a pass to get me in, and around where I was allowed to be.

I had to have an escort to go anywhere until I was finally taken to the security office to get my pass when it was ready. The escort went back to his office, and  the pass made and given to me with the serious instructions not to go anywhere except the obvious places to do my job.

I thankfully set off by myself to go back to my office, when I noticed something odd. People  were going to their doors and covering the lock combination keys with one hand. I suddenly realised I was in a high security office corridor, and I was not supposed to be there.

I beat a quick retreat to a corridor with which I was familiar, thankfully not meeting any guard. No international incident evented!

1971 - the year I got chicken pox.     Good job you weren't 'spotted' out of bounds. 

I had to have an escort to go anywhere until I was finally taken to the security office to get my pass when it was ready. The escort went back to his office, and  the pass made and given to me with the serious instructions not to go anywhere except the obvious places to do my job.

I thankfully set off by myself to go back to my office, when I noticed something odd. People  were going to their doors and covering the lock combination keys with one hand. I suddenly realised I was in a high security office corridor, and I was not supposed to be there.

I beat a quick retreat to a corridor with which I was familiar, thankfully not meeting any guard. No international incident evented!

I took my first photos in about 1950 using my Dad's Kodak Portrait Hawkeye camera. It was a cardboard box camera (based on the early Brownie cameras) with a close-up lens that could be swung up in front of the main lens. It had a top viewing tiny window, which looked at a tiny screen with its own tiny lens. You could view this through the window giving a portrait or landscape view.

No one really expected sharp snaps in those days, and the prints would have burn out of highlights and impenetrable shadows.

To think I even contemplated getting some colour film - I can't remember the make, it had colour masking filter lines on the film surface.to separate the colours (sort of pixel size strips.) Of course , it used 120 film spools, and you looked through a red disc to see the frame number on the film backing paper.