The former chief of the CIA unit tracking Osama Bin Laden has told Congress that the Agency now has * fewer experienced case officers* assigned to dealing with Bin Laden than it did at the time of the Sept. 11 attacks. The officer Michael Scheuer described a situation where the unit tracking Bin Laden is stretched so thin that the CIA often relies on inexperienced officers who are rotated in and out of the unit every two or three months. Scheuer told Congress, “There has been no systematic effort to groom Al Qaeda expertise.”