A retiring Arizona police officer gets his shield tattooed right next to the scar from the bullet that nearly took his life, and a local officer recalls the time she survived an attempted car jacking.

California K-9 officer Matthew Harger gets a paw print and badge tattooed on his leg as a tribute to his partner Thor who saved his life during a call, and a gang unit sergeant gets himself back on the streets after losing his leg in a shootout.

A New York City firefighter gets a tattoo tribute to the first responders who lost their lives during the 9/11 attacks, and a detective commemorates four murdered children.

A young policeman comes in for a tattoo following a life-or-death struggle with a suspect. A K-9 officer springs into action when wildfire threatens her own home and town she is living in.

Legendary Los Angeles SWAT team leader Rick Massa recounts the 1997 Bank of America robbery and shootout. New Jersey K-9 officer Brian Howarth pays tribute to the dog who worked with him during recovery efforts at Ground Zero after 9/11.

Partners Chris and David commemorate a life-and-death struggle with a shotgun-toting suspect who nearly took Chris's life. Tennessee K-9 officer Kayla tells how her dog captured a child rapist.