Speculation a recent air force exercise and rocket propulsion system test are linked to a debate on a strike against Iran is \"nonsense,\" an official said. Israel Radio quoted an anonymous Israeli defense official as saying Thursday it is \"absolute nonsense\" to presume a recent air force exercise with the Italian air force and the testing of a rocket propulsion system are linked to reports Israel is preparing for a possible airstrike on Iran\'s nuclear sites. The official\'s remarks come amid intensive public debate over reports Prime Minister Binyamin Netanyahu and Defense Minister Ehud Barak are pushing for a strike. The army\'s Home Front command conducted a drill Thursday simulating missile attacks in the center of the country. Sirens also were tested.