For students from elementary to high school, the Sept. 11 terrorist attack isn't a memory. It's history. A new HBO documentary that debuts on the event's 18th anniversary treats it that way. The necessity of her project, "What Happened on September 11," struck filmmaker Amy Schatz when a third grade girl told her about a playdate where she and a friend Googled "Sept. 11 attacks." More.
HBO produces documentary to help kids understand 9/11