I was at the Harvard Museum. It's free for me! I took a tour of the Pop Art exhibit. The main artist is Corita Kent but they put other works by contemporaries to show context.
Here's a Robert Frank's black/white photo called Indianapolis. It was dated 1955-56. This photo I found on the the Intersweb because I did NOT take a photo of a photo in the museum. That's usually a no, no, although I don't know why. The movement is perfect --from eyes to lips, while everything else suggest stasis.