However, occasionally they write something like this.
It is real simple. The technology and access in materials, engineering (mechanical/electrical) and physics involved in making “the bomb” is readily available top nations today. Even a retarded nation like North Korea has been able to scrape together 6 - 8 nukes. Likewise is the case for the delivery systems. The end of the cold war, dual use technologies, the access to information and multicultural societies where large numbers of foreign students study in the West or are employed in high tech industries etc simply makes the information at our finger tip. It was a marvel in 1945, but today Iran can do it too. It's difficult to stop.
We need to try to contain this, but we for sure need to devise defense systems to counter this threat.
MDA in the future, bad mouthed by such idiots as the ones writing for “Der Spiegel” won't be such a dumb, destabilizing, arms race starting, system devised against imaginary threats in the future.
The problem with system like this is that you can't pull them out of your ass in a short time. Like a carrier, they take time to build. If in 2013 something pops up, it's to late to start scrambling then because it'll take a while before we can even get something on its feet.
There has been several people in the United States who have sucessfully designed a “private” atomic bomb using “off the shelf” parts.