Possible Duplicate:
How Did Éowyn Slay the Witch King of Angmar if He Wasn’t Alive?
I've watched The Lord Of The Rings trilogy so many times, but I have never actually read the books. In the third movie Eowyn is able to kill the Witch-King simple because she is Not a Man. Does the same thing happens in the book? I mean Is this all that takes to kill a Nazgul? Not be a man, or was it something about Eowyn (maybe a bloodline or something), that made her able to kill him. If so, Arwen could have killed him as well when she was hunted carrying Frodo to Rivendell?