It took 2,977 drones to create this stunning 9/11 memorial show. Here’s how they pulled it off

One of the biggest challenges was finding a suitable launch location.

[Photo: courtesy Sky Elements Drones]

To remember the lives of the 2,977 people killed in the 9/11 attacks 25 years ago, 2,977 drones were arranged in the shape of the original Minoru Yamasaki-designed World Trade Center at full architectural scale for a stunning temporary memorial. It took a lot of planning to make it work.

Called “2,977 Lights Over New York Harbor,” the commemorative........

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