Thursday evening, at 7:30, a splendid rainbow appeared over Center City, arching over the Comcast Center. It was a gift, a rare appearance of a rainbow in an urban environment. Indeed, if you live in cities, you can go fyears never seeing one.

The sky was magnificent, a cover of steel with the sun blasting from the West. People stood on West River Drive and the Ben Franklin Parkway transfixed, as if in a movie, pointing at the sky. The only rub that it was a beast to drive because commuters were leaning forward over their steering wheels trying to get an optimum view. Did you see it? What a treat.