Codename: Demon

you are a girl in college, your assignment for history class is on the war in Afghanistan. during your research you dig up an article about a Marine who's only referred to by a codename, Demon. you find a single picture and he looks like someone from your hometown. you make copies of the article and it talks about how he earned the medal of honor. you are heading home for a week and deside to find out if hes him or not. you know him as David