How to make a dirty bomb They say it's easy to build your own atomic weapon. Is it? Jon Ronson takes a crash courseBy Jon Ronson It is a Monday in July and I have been commanded by the Guardian to attempt to purchase the materials needed to build a nuclear bomb. The enduring rumour is that anyone with a fanatical resolve can build one in their "garage or basement". Is this true? Actually, I can report that it is not proving to be chillingly easy, which is good news for humanity, but bad news for me personally as I...