Meanwhile Israel is seeking permission from Congress to buy 100 guided bunker busting bombs from Lockheed Martin. The bunker busters are designed to penetrate underground command centers or weapons facilities. Analysts say Israel could use the bombs in an attack on Iran. Congress has 30 days to decide whether to allow the sale to go ahead. According to news reports Israel is seeking non-nuclear bunker busters. However the nuclear version of the bunker buster is also in the news this week. A Congressionally-mandated study released Wednesday found that an earth penetrating nuclear bunker buster could cause more than a million deaths from radioactive debris. The Bush administration has asked Congress to spend over $8 million on researching the bomb.