Human Shields, No Résumé Needed AGHDAD, Feb. 20 — A rather jaunty sign advertising the grimmest of tasks was pinned up on a small notice board labeled "Human Shields" in the airy lobby of the Andalus Hotel Apartments here this morning. It sought three additional volunteers to join the 13 already committed to living at the Baghdad South Power Plant to try to prevent its being bombed in the event of war. "There is no more important place for a shield to be," the notice read. Volunteers from half a dozen nations expect to move into a large, collective dormitory...