Speaking of evolution:

American UFO Spotted In Afghanistan

But many UAV engineers, and some fighter pilots, believe that combat UAVs could revolutionize air warfare. Combat UAVs can perform maneuvers that a manned aircraft cannot (because there are limits to the g-forces a human body can tolerate.) In theory, software and sensors would make a combat UAV much quicker to sort out a combat situation, and make the right move. For the moment, this aspect of UAV development is officially off the table. But once combat UAVs start operating, and that will be by the end of the decade, there will be much pressure to let combat UAVs rule the skies, in addition to scouting and bombing.

Meanwhile, no one is saying what a combat UAV design is doing in Afghanistan. But there it is, operating as a UFO (unidentified flying object).