FILE - In this March 15, 2007 file photo Israeli school children wear gas masks during a drill organized by the Israeli Home Front Command  simulating a chemical missile attack in a shelter at a school in the central Israeli city of Lod. Israel's outgoing civil defense chief said Wednesday, Aug. 15, 2012 that an attack on Iran's nuclear sites would likely trigger a drawn-out war that would last months and kill hundreds of Israelis.(AP Photo/Oded Balilty, File)