Do you know what a hohlraum is? To save you the trouble of a lookup, Wikipedia says it's 'a non-specific German word
for a "hollow area" or "cavity" '.
It's at the heart of peaceful (?) nuclear research at Lawrence Livermore Labs in the US (one of their directives is 'to enhance national security'), where it's a
gold container smaller than a sewing thimble.
A hohlraum' is also at the heart of a WMD in the
hands of Islamist terrorists in my latest action thriller 'Sword of Allah'. There's plenty of suspense and action at Amazon available to pre-order (launching Monday 19th Septemeber). It's also available at iTunes and at B&N, and in paperback at all good bookstores.