CIA Caught 'Off-Guard' By Jakarta Hotel Terror Attack

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Jemaah Islamiyah

The group's second-in-command was recaptured last year after escaping from a prison in Singapore.

"The lesson here is that unless you take out all of the leadership, a group like this will continue to operate," said Clarke. "Every root and branch has to be taken out for the group to be truly dismantled."

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Indonesian, U.S. and Australian authorities are now focusing on the group's remaining leader, Noordin Top, who is considered a charismatic recruiter, financier and bomb maker. He was reportedly trained in explosive at an al Qaeda camp in Afghanistan in the late 1990s.

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