Yanis Kanidis, a janitor at the school which was attacked in Russia, gave his life for those of the children. Please go to this translation of the story in the Hebrew press and read about his heroism. He is an example of dedication, care and sacrifice.
UPDATE As Allison herself posted, there is now some dispute as to what actually occurred. I would post the newspaper entry contradicting the orignal story, but it is apparently no longer online.
Whatever this man did exactly, the tragedy of terrorism touches all who are effected and in many ways, all those inside, all those who were forced into trying to live moment by moment during such a crisis are heroes.
Thanks to the comment by Avital alerting me to the controversy.