Back in 2009, Marine Corporal Jeff DeYoung was paired up with a black lab named Cena while in Afghanistan. Jeff and Cena became instant best friends. Cena was just 9-months-old, and Jeff was only 19.
But after all these years together, it's time for them to say goodbye.
The bomb sniffing dog had to be euthanized because of an aggressive form of bone cancer.
Cena was given a true hero's sendoff.