How do you go about getting a therapy dog for a retired veteran?

Therapy dogs don't have any special training, so if I were looking for one, I would hit the local humane society. I picked up a terrier mix rescue back in may and if I wanted a therapy dog, she would certainly fit the bill. I work from home most days and she is right by my chair most of the day, then spends the evening on the foot of my recliner.
I like to tell people if they want to see unconditional love, lock their girl friend/wife and dog in the trunk and drive around for about 30 minute and see who licks your face when you let them out ;^).
There are agencies that will register your therapy dog. Be aware that therapy animals in reality have no legal protection like a service animal. A business has every legal right to restrict their entry.