I FUCKING LOVE THIS SONG. This is one of Iron Maiden's biggest hits ever, if not THE biggest. The first Maiden song I learned on the guitar, my personal favorite, and just a damn amazing song all around. The album which shares its title was also one of Iron Maiden's most successful, being the first to reach platinum status in the United States (over 1,000,000 copies sold). This was also the first album to feature singer Bruce Dickinson, who has remained their singer for almost their entire history since then.
A reader commented that I hadn't been playing any Iron Maiden at all, so here you all go, I believe this counts as sufficient repayment for my negligence. :)