The plot of The Empty Region takes us from the base camps of the holy warriors in Pakistan to the security corridors of the CIA and the FBI. The book is a fascinating puzzle full of historic characters including Osama bin Laden and George W Bush, as well as officials with inside knowledge of the tragic events of 9/11. Szichman takes us to the terminals where the al-Qaida air pirates conclude their ritual, carries us in the planes as they become guided missiles, and relives the 102 minutes that saw the burning towers of the World Trade Centre become hell on Earth.