One way I like to thank retirees -when I shop in our local commissary (base grocery store for those of you that dont know) I always request a vet for my bagger. As we walk out to my car I thank him from the bottom of my heart for his service to our country and the very freedom most of us enjoy. Then I hug them, give an outrageously high tip and tell them to have a fabulous day. I have seen more than one wipe his eyes as he walked away.
IT IS NEVER TOO LATE TO THANK A VET!!
Very cool of you. Very cool indeed. :)