"He gets to retire and relax at home and I still have to get up and come to work," said Officer Melina Walker of the Phoenix Police Department. "He's almost 10. I received him when he was 2, so we got back from Lackland when he was 2 and have been at the airport ever since then."
K9 cop Aldo has been on the force for 8 years, keeping passengers at the airport safe.
"If an airplane comes in that has a threat on it and they have to take every one off the plane, we'll go in and search the plane -- search all the luggage and make sure that there is not a threat on the plane," said Walker.
Walker says Aldo isn't ready to quit, but the constant climbing and moving on the job wears on a dog.
"I feel bad because I do see him whenever I put the uniform on and have to leave and see his face and he's like, why am I not going? He has such a great personality and he likes to come to work. He likes people, he likes just being around just everything here at the airport."
The German Shepherd may be off the job, but Walker says old habits die hard.
"I don't think he's ever going to grow out of being a detection dog. He's always going to be a detection dog," said Walker.
Aldo will spend the rest of his life living with Walker.
"He'll be in the pool, he'll be running around with the other dogs, just having a good time just being a puppy -- just being a puppy now instead of a working guy," said Walker.
Aldo has officially been off the force for the past month and Walker says she's working with a new dog at the airport, but he's going to take some more training.