THE disastrous journey that led a waiter at a curry house in Manchester to the United States to hijack a plane for Al-Qaeda began not in a mosque but at a roulette table. “Every night when we closed up at the Sher Khan, we would drive around the casinos,” he said. “One night I thought I would go in with the others to see what it was like.” His decision that rainy Manchester night seven years ago was one that he believes he will always regret. Soon he was gambling almost every night and ran up debts that allowed Al-Qaeda...