Social media lit up around 7:30 this morning with hundreds of pictures of an incredibly dramatic sky over New York City, with layers of dark, intense clouds swirling over Manhattan. Clouds this ominous usually signal the approach of a horrible storm or Tammy Swanson. What kind of clouds were they?

When something major happens in our lives, we remember the strangest details. The smell of the car, the music on the radio, what we ate. One of the biggest things that people remember about that day thirteen years ago was the sky. Damn, that was a blue sky.