Nuclear Issues

In September 2009, a group of masked men armed with automatic weapons and explosives arrived on the roof of a cash depot in Vastberg, Sweden in a helicopter. The men blasted their way through a skylight and hoisted millions of dollars up to the hovering aircraft — the operation took less than 20 minutes. When police rushed to respond they discovered a bag with the word “bomb” at their heliport — a diversion planted by the thieves — and caltrops (road spikes) near the depot to slow down their response on the ground. While many of the thieves were caught after an investigation, most of the money was never recovered.

In the spectrum of threats to nuclear security, highly radioactive materials such as cesium-137 and cobalt-60 represent a set of concerns and challenges which is much different from that of fissile materials like highly enriched uranium. Unlike the latter, they cannot be used to build a nuclear weapon. However, terrorists could use such sources to construct a so-called “dirty bomb”, an improvised explosive device which spreads the radioactive substances in a populated area. Although, according to most planning scenarios, such a “dirty bomb” would likely cause few radiation-related casualties, its economic effects could still be in the billions of dollars – especially if parts of a city needed to be shut down for weeks or months while they are being decontaminated.

Harvard's Nuclear Security Matters provides accessible analysis from the world's leading experts on nuclear security and nuclear terrorism.