Monuments aren't always made of stone. You might say that there's a World War II memorial embedded all through American culture. It's in the fiction of Norman Mailer and James Jones, in the wartime poetry of Randall Jarrell and Anthony Hecht, in the tremendous D-day invasion scenes of Saving Private Ryan. Any one of those will give you just a glimpse, but an unforgettable one, of what war can be.
All the same, for reasons anybody can understand, veterans have for years been looking for a large-scale acknowledgment on the Mall in Washington, the national memory bank where the Korean...