Pakistan's Volatile North-West Frontier ^ a b Study of the Pathan Communities in Four States of India , Khyber.org (retrieved 30 January 2008) ^ PBS Frontline : Pakistan: Karachi's Invisible Enemy City potent refuge for Taliban fighters . July 17, 2009. ^ "How the Taliban kept their coffers full" . http://atimes.com/atimes/South_Asia/IA10Df02.html