A sure sign of summer in D.C., more even than long lines at the Capitol Visitors’ Center or Code Orange air alerts, is the suit jacket carried over a shoulder.

I noticed at least half a dozen examples of this on yesterday’s walk around the Mall, but didn’t snap any photos.

So for this one you’ll have to imagine it 20 degrees warmer, air steamy rather than brisk. Feel the heat radiating up from the pavement, see the leaves not moving on the trees.

It’s summer in the city. Jackets off!