There may be no more gruesome job than that of a soldier: they work in the worst of conditions, with orders to kill. Even if they survive, the nightmares can last a lifetime. It is hardly work fit for an adult, much less a child. And yet, 300,000 children serve as soldiers in more than 60 countries around the world. Amy Costello travels to the tiny West African nation of Sierra Leone, which is just beginning to recover from an 8-year civil war, and found that children are a fighting forces' most valuable asset.