"If war again comes to Iraq, depleted uranium munitions will be a mainstay of the American arsenal. For years, the Pentagon has discounted reports that the shells and bullets, made of solid nuclear-waste byproduct and used for the first time on a large scale in the Iraq war, bore calamity. ... 'There just isn't any scientific foundation to draw a connection between exposure and the incidents of leukemia, other cancers or birth defects,' said Michael Kilpatrick, deputy director of deployment health support at the Pentagon. ...