You may want to catch the FACES OF THE FALLEN display at the Women in Military service memorial at Arlington Cemetary (on the Blue Line). Regardless of your politics, this is a wonderfully poignant display of the faces of the men and women who have fallen in Iraq and Afghanistan, done as individual portraits in a wide variety of styles.
I've taken a few photographs, which are available here:
There's also a link to a bigger slideshow on FLICKR, as I didn't want to overwhelm my account bandwidth with a bunch of slow loading images.
The sad thing is the average age of the people displayed here: maybe 24 or 25 tops.