Today I'm reminiscing about sandals, probably because it's the 4th of July, the quintessential summer day. What kind of sandals do you remember wearing in the summertime? Dr. Scholl's "exercise" sandals. These were the forerunners of Shape-Ups, I guess. I was never allowed to have them, because I'd break my neck. Mom was probably right, although I think she just didn't want to listen to me clomp around in them. I remember them being part of the Dr. Scholl's footcare display at the drugstore…