A deep crack just discovered this week in the concrete containment wall of the Crystal River nuclear reactor on Florida’s west coast signals a disturbing trend in on-going cracking and corrosion and other dangerous wear-and-tear symptoms among the country’s fleet of aging reactors.  Beyond Nuclear argues that it is time that the U.S. Nuclear Regulatory Commission fulfill its Congressional mandate to look out for public safety instead of risking lives to save nuclear utilities money. The agency should keep the Crystal River reactor closed, Beyond Nuclear argues, while seriously evaluating the safety of continuing to relicense the country's aging reactor fleet.