The group Rolling Thunder is spearheading an effort to bring attention to the thousands of Americans who were either prisoners of war of went missing in action in the nation's wars.
Since World War I, that number is more than 90,000 and thousands are still missing.
Over the weekend, a small town in Massachusetts held a ceremony to honor them. A granite empty chair was unveiled to represent them.
Here & Now's Alex Ashlock reports.
This segment aired on July 22, 2013.