DEAR READERS: Today marks the 100th anniversary of America’s entry into World War I. In commemoration, I’m mentioning a special initiative to save America’s war letters. Almost 20 years ago I wrote about a historian, Andy Carroll, who had launched a project to seek out and preserve war-related letters as a way of honoring and remembering our veterans, troops and their loved ones. After the column appeared, Andy was deluged with responses. Today that collection holds approximately 100,000 wartime correspondences — from handwritten letters penned during the American Revolution and Civil War, to emails from Iraq and Afghanistan. Andy has donated the entire ...