Every year since the attack, these powerful beams of lights - one for each fallen tower - are turned on the day before 9/11 and will stay illuminated until after all of the remembrances are held.
Both of these photos were taken from the Brooklyn Heights Promenade. They are time exposures using a tripod. I could not hand-hold my camera and get these pictures. In order to get all of the buildings and the beams to show properly, the timer needed to be set between 5 and 15 seconds.
The beams of light are a reminder the threat of terrorism is still very real and that - despite the passage of time and the political in-fighting going on about the future of the site - we mustn't forget the people who lost their lives then and the ones who've made the ultimate sacrifice in the middle-east fighting the war against terrorism.