A week ago, I flew through Atlanta and Salt Lake. The airports were loaded with military. I shook hands with each one of them and thanked them for their service.
I don't travel often, but last week I did fly into and out of Atlanta. You're right, it was loaded with Military. I tried to thank as many as possible, and to make the thank you specific I pointed out that they were the reason I had no fear of getting on my flight.