The government has ended its first <A HREF="http://news.zdnet.com/2100-1009_22-6038082.html?tag=nl.e589">large-scale mock cyberattack,</A> aimed at gauging the nation's readiness to handle such threats, the Department of Homeland Security said Friday. The weeklong exercise, dubbed "Cyber Storm," was organized by the department's National Cyber Security Division and 115 public- and private-sector partners. It was designed to model the coordination among government and industry necessary for responding to and recovering from "large-scale" intrusions affecting the energy, information technology, telecommunications and transportation sectors.