The Biden administration vowed last month to crack down on companies that sell critical technologies to Russia as part of its efforts to curtail the country’s war against Ukraine. But the continued flow of Chinese drones to the country explains why that will be hard.While drone sales have slowed, American policies put in place after Russia’s invasion have failed to stanch exports of the unmanned aerial vehicles that work as eyes in the sky for frontline fighters. In the year since Russia’s invasion of Ukraine, China has sold more than $12 million in drones and drone parts to the country, according to official Russian customs data from a third-party data provider.It is hard to determine whether t …
