One of the key factors for anyone studying 9/11, and indeed the "war" on terror, is Pakistan.
With the possible exception of Saudi Arabia, no country has been as central to both Al Qaeda and the USA.
Over the years the Channel 4 Dispatches team have produced some extremely dubious documentaries (for example the 1994 "expose" of fascist violence in Yorkshire) Let's hope that Monday evenings programme, where author Ziauddin Sardar examines the balancing act between the military and religious leaders in Pakistan, is a good deal better.
Dispatches:Between the Mullahs and the Military is at 8pm on Monday 23 April.