Cpl. Ryan Miller, military police officer and dog handler with the Quantico Provost Marshal’s Office's K9 Unit, exposes his unit’s dogs, including German shepherd Pepo, to gunfire until they no longer react, even at close range. The gun is shooting blanks. - Cpl. Ryan Miller, military police officer and dog handler with the Quantico Provost Marshal’s Office's K9 Unit, exposes his unit’s dogs, including German shepherd Pepo, to gunfire until they no longer react, even at close range. The gun is shooting blanks.