Misawa AFB, Misawa, Japan
I was the junior class sponsor that year, and obviously someone snapped a photo that I didn't know existed. If I remember correctly, it snowed that day, and everyone arrived for the banquet and prom in lovely gowns and winter coats. Who knows why I packed the long black dress to take to Japan, but in came in handy a few times.
Have you ever discovered a photo of yourself on the Internet that you didn't know existed?