HONG KONG: It was a device worthy of Rube Goldberg or Wile E. Coyote: a dozen remote-controlled launching tubes secretly buried in the turf at Hong Kong's most famous horse race track last week, armed with compressed air to fire tiny, liquid-filled darts into the bellies of horses at the starting gate. No horses were hurt, because the track supervisor noticed something underfoot before racing started, discovered the elaborate mechanism concealed by grass-colored tape and called in a police bomb squad to remove it. But the discovery of the device, equipped with elaborate electronic controls, has raised concerns about security...