If you've ever stood in an open field where a great battle was once fought, you know the eloquence of its silence. In the hush, you strain to hear the clash of armies. You try to imagine the suffering, and what made it all so important.
This Memorial Day, of course, the flags and the parades feel different. We've seen great loss of life, and the video plays over and over in our memory. Up next, we focus on another American September, in 1862, near a small creek called Antietam, near the small town of Sharpsburg, in Maryland.
That day, more than 4000 soldiers died that day, the single bloodiest day in all of American history. Why they fought, what their deaths accomplished, what the silent battlefield says.