Aircision and TNO have completed their test of setting up fast data transmission links between two towers using laser beams. They succeeded in 10 Gb/s data transmission over a distance of 2.5 kilometers, which is considered an important landmark for ground-to-ground laser communication. This ‘fiber-optic-through-the-sky’ technology, named free-space optics, can now make its way into 5G broadband connectivity.