Arlington National Cemetery, final resting place for thousands of American soldiers and others who have served and sacrificed, isn't just about the history of war.

Yes, the rows and rows of white headstones tell war stories across the generations, honoring young soldiers killed in action as well as veterans who lived into old age long past their military service.

And yes, there are memorials here marking tragic moments in American history, including a tribute to the astronauts who perished when the Space Shuttle Challenger exploded and the eternal flame at the grave of President John F. Kennedy.