LOS ANGELES -- Six nails embedded in the skull of construction worker Isidro Mejia, 39, after an industrial incident caused a nail gun to shoot nails into his head and brain on April 19, 2004, are seen in this X-ray image. Five of the six nails were removed in surgery that day and the sixth was removed from his face on April 23, after the swelling went down. (05/05/04 AP photo)