Luna, a Coast Guard explosive detection canine stationed with Maritime Safety and Security Team (MSST) 91101 at Base Seattle, picks up a scent during an annual re-certification test administered by Transportation Security Administration personnel at a car lot, Sept. 19, 2016.
MSSTs are domestic, mobile units that possess specialized training and capabilities to perform a broad spectrum of port safety and security operations.
U.S. Coast Guard photo by Petty Officer 2nd Class Ali Flockerzi.