T he revolving chain of a nunchuk has a unique radar 
signature—reminiscent of that of a helicopter blade, but noisier," Miss 
Pao said, gazing up at Judge Fang over the half-lenses of her phenomenoscopic 
spectacles. Her eyes went out of focus, and she winced; she had been lost in 
some enhanced three-dimensional image, and the adjustment to dull reality was 
disorienting. "A cluster of such patterns was recognized by one of Shanghai 
P.D.'s sky-eyes at ten seconds after 2351 hours."