When it comes to world-class marathon runners, Kenyans are considered the cream of the crop. But some of Kenya's top runners aren't running for fame and fortune. Some are wanted warriors, running for their lives.For years, Julius Arile and Robert Matanda thrived among the bands of warriors that terrorize the North Kenyan countryside. Stealing cattle, raiding and running from the police is the only life they knew. So when both warriors suddenly disappeared...