The hundreds of Russian drones hovering ominously over the Ukrainian battlefield owe their existence to an elastic, sanctions-evading supply chain that often runs through a shabby office above a Hong Kong marketplace, and sometimes through a yellow stucco home in suburban Florida.

The "Sea Eagle" Orlan 10 UAV is a deceptive, relatively low-tech and cheap killer that has directed many of the up to 20,000 artillery shells that Russia has fired daily on Ukrainian positions in 2022, killing up to 100 soldiers per day, according to Ukrainian commanders.

An investigation by Reuters and iStories, a Russian media outlet, in collaboration with the Royal United Services Institute, a defense think tank in London, has uncovered a logistical trail that spans the globe and ends at the Orlan's production line, the Special Technology Center in St. Petersburg, Russia.