Officials in New York City today began the annual commemoration of the 9/11 attacks at 8:39 a.m., the moment the first plane hit one of the twin towers on September 11, 2001.

The tribute in light will return for one night, as a tribute to all those who were lost on September 11. The lights will be on for one night tonight, beginning at sunset and fading away at dawn on September 12.

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