Finding Nuclear Truck Bombs

from the first-steps? dept.
Mr_Farlops writes "Wired Magazine examines a system of passive and active sensors that might someday be installed to detect and track unexpected and unexplained radiation sources moving on US roadways, shipping ports and airports. The system has been proposed as a method to prevent dirty bombs or nuclear weapons being transported by criminals or terrorists. While not quite the active shields described in Engines of Creation, it does give a near-future example of what might be achieved with defenses against nanoweapons."