On a sunny Sunday afternoon in March, Dennis Spear watches his 15-year-old son Matthew Spear pilot a tiny metal drone through a course at a park outside Fresno.
“[They’re] like a swarm of angry bees, ” Spear says.
Drones have exploded in popularity as the price of the tiny machines has fallen. More than 700-thousand drones were sold in the United States last year.
These drones aren’t what you may have seen in the neighborhood or heard about on the news. They are smaller than a Frisbee and are very light weight.