Maajid Nawaz - Chairman of Quilliam, counter extremisim organisation

Maajid Nawaz is a British born Muslim who became a radical Islamist.

He was arrested and imprisoned in Hosni Mubarak's Egypt but when he emerged from prison he renounced his former views and launched a campaign to counter Islamist ideology.

To some he's a truth teller, to others a traitor.

Stephen Sackur asks him to explain his extraordinary transformation.