21.   Sniffing dogs helped them identify the nature of the cargo, the statement said.

22.   The luggage had been doused with mustard to avoid detection by sniffing dogs.

23.   They kept working, using sniffing dogs and sonar listening devices, but found no more signs of life.

24.   They learned how to use hand-held metal detectors and work with sniffing dogs.

25.   Tokyo spurned most offers of help, from specially trained European sniffing dogs to a U.S. aircraft carrier to serve as a hospital ship.

26.   A bomb sniffing dog searched the truck but no weapons or explosives were found.

27.   The Westbury center was reopened after bomb sniffing dogs scoured the area.

28.   Nassau County police spokesman James Fullam said the Westbury center was reopened after bomb sniffing dogs scoured the area.

29.   Policemen found traces of explosives, enough to attract a bomb sniffing dog in what authorities considered to be a hoax.