Nuclear News Roundup Sep 17, 2019 Merkel urges return to Iran nuclear deal to defuse Middle East tensions. Yahoo.com This is how a nuclear war would play out, according to a Princeton University simulation. Nydailynews.com Even a limited nuclear war would be catastrophic and kill millions, a new study finds, despite the belief of the Pentagon that the U.S. military could effectively and safely use nuclear weapons in a conflict. Commondreams.org The partially melted reactor core from the worst nuclear accident in U.S. history could remain in Idaho for another 20 years if regulators finalize a license extension sought by the U.S. Energy Department, officials said Monday. Pennlive.com