Over the course of the past weekend, not to mention over the last 10 years, it has been said often enough that there are no words to express the horror of 11 September, 2001. This hasn’t stopped people from trying, of course – and sometimes with commendable results. But basically there just isn’t much effective vocabulary when it comes to describing grief and torment on a grand scale: hence, perhaps, America’s seeming lack of closure regarding the whole episode, and the often slightly surreal and distant nature of 9/11 documentaries.