We took a trip a couple of weeks ago to DC. It was really hot; approximately 40C (105F) during the day. At night time, we went on a number of tours including a stop off at the stairs on M Street. We snapped numerous pictures while on vacation. As luck would have it, the only pictures that didn't turn out (3 in total) were the ones by that mysterious staircase – just a dark crazy blur. I called it a coincidence, but my wife was spooked. Nonetheless, it was great stopping by there.