https://www.cnet.com/news/facebook-tests-lasers-that-shoot-high-speed-internet-through-the-sky/

How can Facebook expand past its 2.2 billion monthly active users? Perhaps by bringing the internet to more places.

Facebook has tested one method that uses plane-mounted lasers that can shoot a high-speed internet connection through the sky, according to a February 2018 paper seen by Business Insider. With the lasers, the company was able to create a wireless link between the plane and a ground station 9 km (5.6 miles) away. Facebook confirmed these details to CNET.