Drones save people. They also map terrain, survey land and inspect pipelines. The scientists use drones for these and other purposes on a daily basis, and they have bragged about their successes in the field. Many of the aircraft are made by Chinese companies, though. They are now grounded because of concerns about espionage.
The drones had been deployed for years by the scientists and others at the US Department of the Interior, a federal agency that manages national parks and other duties. But the head of the federal agency, David Bernhardt, is apparently now worried that the drones could be used for espionage.