The public controversy over depleted uranium (DU) seems to follow a standard trajectory-scientific closure, via the reduction of scientific uncertainty, led directly to policy closure, as government bureaucracies increasingly downplayed its dangers and denied redress to exposed individuals. Closer inspection, however, reveals a more complex dynamic. A series of expert, public science reports, while articulating a shared narrative of DU safety, actually accentuated great uncertainty concerning DU's biological effects, mirroring new uncertainties raised by ongoing scientific research. Policy closure is thus mirrored in neither the scholarly scientific literature nor in broader political realms, suggesting a close and unique relation between the expert reports and governmental policy making. Public science institutions and the expert reports they produce are crucial political resources for resolving governmental policy making but are decidedly less successful at closing the broader political debate. Copyright 2008 by The Policy Studies Organization.
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