This is the Charlie Daniels Band patriotic hit song from 1980. The song was released during the Iranian Hostage crisis and showed the renewed patriotism in the United States during that time. The song was also very popular in the time period after the September 11, 2001 attacks by Islamic terrorist. The song is hated by liberals for its violent and nationalistic overtones (which was probably Charlie's intent). And, of course, the video has on-screen lyrics.
Update 05/01/11 - I think this song has renewed meaning with the announced death of Osama bin Laden. God bless America!