Bin Laden Might Not Be in Pakistan?

Blink and you’ll miss this, from National Security Adviser Jim Jones’ “Meet The Press” appearance yesterday:

MR. GREGORY:  Is it still your belief that Osama bin Laden is in Pakistan?

GEN.  JONES:  That one’s a little bit more elusive.  We are still very much on the hunt.  We think that he’s still in that general region.  But that’s a, that’s a tougher nut to crack.

And yet this was the unambiguous judgment of Dennis Blair, the director of national intelligence, in the annual threat briefing (PDF) he gave the Senate intelligence committee in February:

Under the strategic direction of Usama Bin Ladin and his deputy, Ayman al-Zawahiri, al-Qa’ida remains intent on attacking US interests worldwide, including the US Homeland.  Although al-Qa’ida’s core organization in the tribal areas of Pakistan is under greater pressure now than it was a year ago, we assess that it remains the most dangerous component of the larger al-Qa’ida network.

Is Jones adding a degree of caution to these assessments, or has something changed?