Happy is not the right word as has been noted by one poster above. A better word would be Thanks Veterans.
Along these lines for some years now I have had a problem with the Tomb of the Unknown Soldier. (the name) It seems others have hade the same or a like problem as it has seen an effort to be referred to as the tomb of the unknowns. (didn't stick)
Well here's my take after a lot of thinking about it and walking around the Shiloh Military Cemetery. One day as I was reading names, rank, unit, etc. I came upon an "unknown". As I stood there think it dawned on me "this person was/is not unknown" just not identified". So for the Washington tomb I think the name would better be "THE TOMB OF THE UNIDENTIFIED" I say this because everyone is/was known by someone, but in the ravages of war just not be identified..