One way to understand what war will be like is to understand what past wars were like. Andrew Carroll recently started something called the Legacy Project, which collects letters Americans wrote home during wartime, from the Civil War up through the conflicts in the Persian Gulf and Bosnia. It's over 50,000 letters, a portion of which he assembled into a book titled War Letters. We also hear from Estelle Lynch, who received over 500 letters from her fiance Sid Diamond during World War II. (14 minutes)