I arrived at 30 Rock this afternoon in time to join our afternoon editorial meeting in progress—and I noticed something on the bottom of my shoe: oil. I had carried it from Florida by air to New Orleans, through the airport, onto the plane, through LaGuardia and all the way to our newsroom. And now...its preserved forever in this photo. This oil stains like ink from a pen—I have it on my shirt and pants, and on a shirt from a previous visit. It doesn't come out. There's a lesson in that.