A lone American soldier stood on a dusty road in Germany, fussing with a controller. Moments later, a drone, with wings that stretched almost as wide as his arms, whirred to life and shot into the sky.
The soldier was taking part in a U.S. Army training exercise designed to showcase and experiment with tactics and equipment picked up from the Ukrainians, whose pioneering drone warfare has helped them against Russia's forces more than 4 1/2 years into the war.
