Cena, who was recently diagnosed with terminal bone cancer, was a bomb-sniffer for the Marines until his retirement in 2014. The celebration for Cena was organized by his owner, Lance Cpl. Jeff Young, who was paired with the dog in 2009 and 2010 while on a combat tour in Afghanistan and who adopted him in 2014. Cena then became DeYoung's service dog to help him with his post-traumatic stress disorder.