"My heart has turned into a sad block of pain. One day I will buy a weapon and I will blow away the fetters. I will propel my living-dead body into your arms, my father, and you will gather me into your hands." The rantings of a criminal psychopath or Mideast terrorist? No, it's from a prize-winning letter by seventh-grader Mahmoud Naji Chalilah, entered in a national children's letter-writing contest among Palestinians.