I once worked for the company the identified by use of mitochondrial DNA the unknown soldier from Vietnam as USAF 1st Lt. Michael J. Blassie.
I have also been to the tomb of the unknown to pay my respect to my fallen brothers in arms (USAF vet).
If you ever get the chance to go, do so.
Two places every American should visit:
The Tomb of the Unknowns
Gettysburg
Its really what Freedom, Patriotism and Sacrifice is all about.