From its early beginnings in World War II, the Special Air Service (SAS) has won renown for some of the most dramatic, dangerous, and controversial special operations of the 20th century. It is a secretive and mysterious unit, whose operations and internal structures are hidden from the public eye. Now, one of its longest-serving veterans offers a glimpse inside its shadowy world. Rusty Firmin spent 15 years with 'The Regiment' and was a key figure in the Iranian Embassy siege in May 1980, the planned attack on Argentina during the Falklands War, and the secret conflict between the SAS and...