The United States imposed sanctions on a China-based network supporting Iran's efforts to procure unmanned aerial vehicles (UAVs)), the Treasury Department said on March 9. The network "is responsible for the sale and shipment of thousands of aerospace components, including components that can be used for UAV applications," the department said in a statement. The Treasury Department also imposed sanctions on 39 entities it said were facilitating Iran's access to the international financial system, describing them as a "shadow banking" network that generates tens of billions of dollars annually.