In the first chaotic weeks after 9/11, two Americans walked into a 19th-century Afghan fortress with nothing but a translator, a notebook, and the kind of quiet confidence you get from hard jobs and worse timing.  Qala-i-Jangi Becomes the Center of a Deadly Encounter The place was Qala-i-Jangi, a sprawling mud-brick stronghold outside Mazar-i-Sharif where hundreds of Taliban and al-Qaeda fighters had just "surrendered" to the Northern Alliance. And those Americans were CIA officers Johnny...