CNN’s senior international correspondent Nic Robertson explores whether Saudi Arabia is on the verge of collapse in the face of outside pressure and internal unrest.

In Kingdom On The Brink, the correspondent takes a deeper look at the terrorists and how their militant brand of Islam is fueled by the Wahabbi religious teachings from Saudi clerics.

Robertson interviews Saudis, including Prince Alwaleed bin Talal, one of the world’s richest men and a leading proponent of reforming Saudi Arabia’s closed society. Other Saudis profiled include Osama bin Laden’s brother-in-law, who was his closest friend for a decade.

The correspondent also talks to former militants who are now working towards the change Saudi society peacefully and bring an end to the violence.