This story incorrectly reported the size of the particle accelerator. It has a circumference of 17 miles. Read the updated story here. We tested 5G speeds in 13 cities. Here's what we found: Faster speed versus more coverage. That's the most important issue for 5G networks today. We drowned AirPods, Powerbeats Pro and Galaxy Buds: We sprayed them, dunked them and even put them through the wash to find out which one of these three wireless earphones can handle the most water.