The winners (by a nose) in top US sniffer dogs competition

  • This May 23, 2018, photo shows Cpl. Tony Testino, of the Passaic County Sheriff’s Department in New Jersey, with his police dog, Luna, after winning a national competition among drug-sniffing dogs, in Galloway N.J. (AP Photo/Wayne Parry)

  • This May 23, 2018, photo shows Luna, a drug-sniffing dog, left, and Hemi, an explosives-sniffing dog, in Galloway N.J., after they won a national competition for police dogs trained to sniff out dangerous or illicit substances. (AP Photo/Wayne Parry)

GALLOWAY, N.J. — One of America’s best law enforcement officers at sniffing out hidden explosives is 8 years old, already going gray and loves nothing more than chewing vigorously on a white cotton towel to unwind.