Cpl. Myles Heath, a dog handler with the Provost Marshal

Cpl. Myles Heath, a dog handler with the Provost Marshal Office, Security and Emergency Services Battalion, Marine Corps Base Camp Pendleton, reports in with Nero, an explosive ordnance detection K9, before beginning their annual explosive ordnance detection recertification on Camp Pendleton, Calif., May 8, 2018. Each year, the handler and K9 are required to conduct a series of tests to ensure the dog remains proficient in detecting explosive material. (U.S. Marine Corps photo by Lance Cpl. Megan Roses)