In the mid 1950s, when Liz visited Washington, my dad told me about walking down Pennsylvania Avenue early one morning, by himself. He was a block from his office, in front of the White House when a limo slowly passed. He waved and Liz waved back. He found the wave to be a once in a lifetime event. That weekend, he and I attended a University of Maryland football game with Liz in attendance. I still have the program.