GUANTANAMO BAY, CUBA — In September 2002, police in the well-to-do neighborhood of Gulshan-e-Iqbal, in the Pakistani city of Karachi, arrested a man named Ahmed Rabbani.
It had been a year since the September 11 attacks, and the Pakistanis, with the Americans, were rounding up people suspected of al-Qaeda ties.
Rabbani, then in his early thirties, appear…
