Who's who in al Qaeda today

When Osama bin Laden returned to the Internet with a new video this week, White House officials were quick to dismiss him as "... a man on the run in a cave who is virtually impotent other than his ability to get these messages out." Diminished as bin Laden himself may be, the global network he leads continues to operate, and a new generation of leaders has risen up to fill the place of those who have been captured or killed. With the sixth anniversary of 9/11 approaching, this week's FP List looks at some of the main al Qaeda figures who remain at large.