When I'm writing about complicated subjects, it usually involves a world. It could be the world of Scientology or the world of Al Qaeda, or the world of counter-terrorism.I look for emblematic beasts of burden - what I call "donkeys" - who can carry the reader through this world. They serve a different purpose. Donkeys are not especially interesting or likeable, but they are serviceable. They will take you into this world. The distinction I'm trying to make is: It's not about them. It's about the world.