One World Trade Center's progress over 11 years. . .

In recognition of the opening of One World Observatory in New York City, we have released a special edition of our One World Trade Center video. Watch and share this commemorative time-lapse movie showing the completion of construction from October 2004 to Memorial Day 2015. Hundreds of thousands of high definition images were captured over the past 11 years and hand-edited for this exclusive time-lapse movie.