Shooting high into the night, the Twin Towers rise above New York again as sparkling pillars of light. The Tribute in Light has graced the Manhattan skyline on a number of occasions. But as tests were carried out ahead of the tenth anniversary of 9/11, their reappearance is particularly poignant. A team of lighting specialists have been working around the clock to ensure the art installation is ready for Sunday, when it will be switched on from dusk until dawn

Lights, action: The Tribute in Light's 88 powerful searchlights will project upwards from Ground Zero from dusk on September 11 until dawn on September 12