The argument over an Arab militant's widow last weekend became so heated that gunfire broke out among insurgent factions, leaving eight people dead... The dead include Usman Punjabi, the abductor of British journalist Asad Qureshi. Tension mounted between the Punjabi (non-Pushtun Pakistanis) and Mehsud (local tribe) militants after an Arab militant was killed in a drone strike, leaving behind his widow. 'The widow was rich and after the incident of husband's death she was alone. The local Mehsud tribesmen took her into their custody and were aiming to arrange her marriage to one of their own men... After the Muslim...