After months of deliberation and 150 meetings, the Obama Administration finally released its new guidelines for nuclear weapons policy. In a sharp break from previous administrations, Obama's Nuclear Posture Review released today dictates the U.S. halt development of any new nuclear weapons and cease to consider nuclear retaliation against non-nuclear nations, even in response to a biological or chemical attack.
Because terrorists rarely announce the technical details of their nefarious intentions beforehand, the threat posed by weapons of mass destruction is not only great, it's multifaceted. So a team from the McGowan Institute of Regenerative Medicine has synthesized a polyurethane fiber mesh that is as variable as the terrorist threat. By mimicking biological tissues like the skin that respond to shifting environments, the a multifunctional polymer can decontaminate a range of both biological agents and chemical toxins.