Its all very well having the radar signature of a sparrow, but how many sparrows fly at 600kts?
WTF?? If you can't see it you can't tell it is going 600kts! or M1.8 for that matter.
On Red Flag some F-117s were locked up by the F3 no less - they were returning from the range and had switched on their anti-anti-cloaking device. During debrief the crew were asked to leave the room and were questioned by a Col on what and why etc - there is a lot that goes on in those ranges that we can only guess the half of - especially when the US only Flags take place!