MICHAEL ZHANG, PETAPIXEL:
"EarthCam has just released the official time-lapse video of the construction of the One World Trade Center. The 2-minute video above spans 11 years from the start of construction in October 2004 to the completion on 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,' EarthCam writes. All the photos and the original camera have been donated to the National September 11 Memorial Museum."