FYI, US army including some of their special forces units still use DJI drones. They're among the most commonly used surveillance drones by several military units across the worldi think in absence of fog they have no courage of doing such coverage.also in this video they showed quadcopter drone and claimed that they use it for surveillance across Loc
https://www.voanews.com/usa/us-military-still-buying-chinese-made-drones-despite-spying-concerns