one of two explanations:
1. the pakistanis have the americans by the short and curlies because of the logistics issue for afghanistan
2. the yanks were always in on the whole taliban (=ISI) charade. they have been doing a "milady doth protest too much" kind of thing. remember what happened in kunduz. (see my old column http://www.rediff.com/news/2001/nov/30rajeev.htm)
both are grave and frightening possibilities.