As I already pointed out, one of the craft disappeared to ground observers when the pilots were in pursuit of the radar target. What makes you think a ufo can't go dark when being pursued by jets? It makes perfect sense to me. Also, there wasn't just possible ground radar contact. It was real ground radar contact with the object confirming visual sightings at the same time. I can if you need me to provide numerous other examples of ufos picked up on radars while sighted by pilots. We know ufos exist. It's just a matter of surveying the evidence.