Reformed islamist and islamist terrorist fund raiser

British police this week arrested three British Muslims in connection with the 2005 bombings on the London subway system in which 52 people were killed.

The world was shocked when the four suicide bombers blew themselves up that morning, especially when it turned out that they were British citizens. The four had been recruited to what is called the "Network," a web of radical Islamic organizations loosely affiliated to al Qaeda which has turned Britain into the western world’s richest breeding grounds for terrorists. How did this happen?

60 Minutes correspondent Bob Simon met someone who knows. And for the first time he spoke about what it was like to be inside that network for ten years. His name is Hassan Butt. He’s only 26 years old, but some of the people he recruited were a lot younger than that.