You can track some of the action here https://global.adsbexchange.com/VirtualRadar/desktop.html# Click global radar view
Then you will have to drag your position over to Nevada here's the steps...
Click Global Radar View let that open in a new browser.
Click set current position
You'll see a "!" red mark over London. (May have to zoom in)
Click the icon and hold it then slide your mouse left
Keep scrolling over as the map moves accross the atlantic ocean
Keep scrolling accross the USA
Drag until you get to your position.
Zoom levels will change how many airplanes you track.
In menu options you can set a filter to Military only and enable filters.
Then all you see is Military not commercial jets.
I found if you take Flight Radar 24 and go to settings then set maps to hybrid. Then take a look over the area you can see this and (zoom in).. Also Area 51 magically appears. Zoom right down to the cars at the base or how many janet flights are there !!