(Valerie Macon/Getty Images)

• Sam Waterston smiling to himself as he walked down Wisconsin Avenue in Georgetown Thursday morning — this just after a street construction worker stopped the former “Law & Order” star to shake his hand. (“This has made my day. I love your work!”) The actor was in town for that night’s Refugees International gala — he’s a board member — honoring Rep. Chris Smith, the late Rep. Donald Payne and Lauren Bush Lauren.