As part of the exhibition “Magna Carta: Muse and Mentor.”

David Rubenstein, the billionaire venture capitalist and philanthropist, unveiled at the National Archives this morning his copy of the Magna Carta, the 13th-century English document that set the groundwork for our system of common law.

Happy Valentine’s Day, Washington. It’s icy out! And, as Encino Man taught us, where there’s ice, puzzlement and disorientation won’t be far behind. We know you’ve got questions: will your power stay on on? Will you have to go into work? How horrible is your commute going to be? We’ll get to that in a second. But first, we must remind you of the traditional Washington area winter storm news edict: THERE SHALL BE NO…