This week marks the 150th anniversary of the battle of Gettysburg. While it's widely known as the critical turning point of the Civil War, the small Pennsylvania town has seen many other battles since then — over how the historic site should be preserved and remembered.
All over the country on Thursday, fireworks will light up the sky. In many places, those fireworks will come with a patriotic soundtrack — one that wouldn't be complete without "The Star-Spangled Banner." The song officially became America's national anthem in 1931, but it's been around since the early 19th century.
This report is part of "Those Who Serve," an occasional series that looks at those who wear the military uniform during a time of war.
It's early afternoon at a small outpost in eastern Afghanistan, and U.S. Army Sgt. Chris Cunningham, with the 10th Mountain Division, heads into a long, dusty tent to teach Afghan soldiers the basics of map reading.
After the sun sets, American soldiers help Afghan soldiers outside the wire. They pop artillery shells containing what's called an illumination round.