On a cool January morning, Israeli ambulances sped to the site of a simulated terrorist attack in Haifa, the country's largest port city. In keeping with the script for the long-planned civil defense exercise, emergency workers responded to a suicide car bomb with one element the country has not experienced in the dozens of real terrorist bombings over the years: this simulated attack dispersed nuclear materials, a "dirty bomb" laced with radioactive Cesium 137.
CNN.com