When I first moved to McLean in August 2002, my first famous-for-DC sighting was at the local Giant.
Here is Al Haig in 1981, when he was Ronald Reagan's Secretary of State, announcing he was a "heartbeat away from the Presidency," after Reagan's assassination attempt.
When I saw Al Haig, he was pushing a shopping cart behind his wife at the McLean Giant.
Actually it looked more like the shopping cart was holding him up, rather than that he was doing any pushing. And he was lagging very far behind his wife, like he knew people were watching and saying to themselves, "There goes that guy who was once a heartbeat away from the presidency. Look at him now. He's just a putz pushing a cart behind his wife."
This could be the very same cart that Al was pushing that day. There's no way to know, really. Think about it. It kind of gives me shivers.