Greg Nichols covers robotics, AI, and AR/VR for ZDNet. A full-time journalist and author, he writes about tech, travel, crime, and the economy for global media outlets and reports from across the U. You might think you should look down toward the water to spot a sub. If you're in North Carolina, you'd be better off looking up. That terrible joke is brought to you by a drone delivery services company called Flytrex, which just announced a partnership with Jersey Mike's Subs.