Samantha Lewthwaite is one of the world's most wanted terrorists. The widow of Germaine Lindsay, one of the July 7 bombers, she claimed ignorance of her husband's lethal intentions, saying she was a victim too. But for the past three years, international security services have been after the so-called `White Widow', who is now on the run in Africa, charged with conspiracy to cause explosions. How did this schoolgirl from a quiet Home Counties market town end up as a friend and confidante of some of the top echelons of al-Qaeda? Film-maker Adam Wishart has spent a year tracking down the real story of Samantha Lewthwaite, revealing her path to radicalisation and the hate preacher who inspired her.