A 1970 hit was named among the greatest guitar riffs of all time and it remains a classic for rock and metal fans.

It features one of the most indelible opening riffs in heavy metal history, and the memorable riffs just keep coming throughout the song. The opening line of I am Iron Man, sung in a voice that sounds ...

Kevin Winter, Getty Images / Vertigo/Warner Bros. Of course, lyrics, even when they have very specific and direct meanings, are open to interpretation by fans, who can apply the words to their own ...