Flash
Veteran XX
The ARGUS-IS real-time surveillance system can fly for months at a time and has a camera array that can track every moving object even a few inches small in a 36 square mile radius. It streams 6,000 terabytes of footage a day and all of it is processed real-time for asset and target location on the ground. They're used domestically and internationally. If you live in DC, Maryland, or Northern VA, chances are there's at least one tracking you right now and recording all your movements into a threat assessment database.