now there are growing calls for a tougher line on pakistan from people like zelmay, former u.s. ambassador to afghanistan. in an opinion column this year in "newsweek" and the daily beast he wrote, "washington needs islamabad to change its behavior and change it now. if pakistan fails to cooperate, washington must cut off assistance to its military and intelligence services." the pakistani prime minister remains defiant. meeting today with a chinese official, he warned against unilateral american action to hunt down hakani militants inside pakistan. late today white house press secretary jay carney added to the warnings saying the pakistani government needs to take action to deal with the links that exist there. carney also said we are obviously always reviewing our aid programs. when asked if the u.s. might curtail its aid to the pakistani military over this. for more we turn to jack keane, army vice chief of staff when the u.s. invaded afghanistan in 2001. he now has his own consulting firm. and nasr, a professor of international politics at tufts university fletcher school. h