New silicon materials research has demonstrated a means of making silicon into a low-yeild explosive. The New Scientist speculates on the security and countermeasures uses of such materials — your cellphone, once identified as stolen, could smolder itself into uselessness (triggered by the cell network) or go bang after warning any nearby theives and bystanders to get clear. Laptops with Internet or radio-based low-jacks could cook their drives and components, and downed spyplanes could cook their seekrit mind-control rays into crapola.