>>513227957 (OP)Not enough range or clearance of the surrounding mountains. The perimeter around Area 51 is at least 10 miles (16km). Hobby drones have at 5km range if lucky โฆ only the largest commercial enterprise drones ($10k+] could go 16km, pretty much the edge of their transmission range, theyโd have to gain altitude over the mountains too, which also interfere with the signal. Anything of that size would be easily spotted too, never mind the radar.