Historic Waverly Alley

This alley connecting 14th and 15th Sts NW has a green sign like a regular street that says Historic Waverly Alley. I ask a guy named Jack who was sitting on a stoop by the alley why it was historic. He said it had been used in a couple movies including In the Line of Fire starring Clint Eastwood. I think it's one of the most interesting alleys I've seen in D.C. It has a lot of stairs, windows, and doors.