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To say that it has been an -- full term for outgoing FBI director Robert Mueller is a vast understatement.
He's been at his post since a week before nine elevenths and through the bureau's adaptation to a new world -- battle with terrorists and extremists.
Tonight -- talks with chief intelligence correspondent Catherine Herridge about some of his biggest challenges past and present.
Robert Mueller has served as the FBI director for twelve years two years beyond the standard ten year term at the request of the president.
As he leaves the bureau Mueller spoke to Fox News about the terrorist threat -- -- attack and domestic surveillance.
So does the FBI collect any data on US citizens.
Yes if you are.
They have the authority from the courts or otherwise under the statutes to capture the emails of somebody.
You capture them in the end you review them.
So to be clear the FBI's only collecting americans' emails.
Under a court or yes.
As the result of the NSA leaks by former contractor -- Snowden.
-- suggested -- -- are changing the way they operate our capabilities.
Around the world have been adversely impacted.
By disclosures on the van Gundy -- -- -- they killed ambassador Stephens and three other Americans Mueller explained why it took two weeks for his agents to reach the scene on the one hand it was diplomatic.
Inertia on the part of the Libyans and on the other hand they're also we center agents and we want to make certain -- -- the adequate security.
-- like in the van Gundy case to the FBI's complex investigation of pan am flight one O three bombing in 1988 over Lockerbie Scotland where 270 people were killed.
As for -- -- what's holding up the investigation now.
-- had a transitory a government should not certain whether this particular prime ministers couldn't be there next week or next month.
We've gone through several inside the one year since Ben -- -- -- -- -- to deal with.
It's hard -- know portability you do not have the security forces that we have developed a report where there have they capabilities that we would hope.
While Mueller would not comment on the administration's initial statements -- video played a role in the -- he confirmed that the bureau dispatched a special team of investigators.
That I've treated it.
As a terrorist attack and that was immediate.
-- -- the recent decision to close nearly two dozen US embassies in Africa and the Middle East based on a credible and specific threat from al-Qaeda smaller said the danger has not passed.
-- we are closely monitoring the situation.
I would say that it may well have been postponed quarter.
Contributing factors I believe is the fact that we ramp up and that well precautions were taken the end that the opportunity that thought they may have had at that -- was no longer there.
As -- reported conference call between terrorist leaders and we're seeing dialogue between core al-Qaeda and the affiliates there is -- countries are going through the Arab Spring that will -- -- Present.
-- the substantial -- down the road so al-Qaeda is not dead.
We just the greatest threat to US national security right now al-Qaeda in Pakistan al-Qaeda in Yemen.
-- cut in North Africa or homegrown terrorism.
I would start with homegrown terrorism and most immediate threat is homegrown terrorism as we've seen in the Boston Marathon.
The thread connecting most homegrown -- from the Fort Hood massacre in 2009 to the Boston Marathon bombing earlier this year.
Is that the suspects -- followers -- -- lucky the first American targeted for death by the CIA.
In the increase in individuals who are radicalized on the Internet.
And in condition that can gain the knowledge on how you develop an explosive device on the Internet that is the biggest threat at this juncture and after that I would say probably.
Al-Qaeda in the Arabian Peninsula.
-- out of I Yemen.
Fox is ongoing reporting of the cleric in newly declassified documents are raising questions over whether the US government tried to recruit on lucky as an intelligence source in 2000 in two.
I am not personally familiar with any effort to recruit and wore a lock key as an asset.
That does not mean to say that there was not an effort at some level of the bureau -- -- another agency to do so.
As for -- -- stayed the bureau in early September Mueller said he would miss his colleagues above all else I -- some sadness in your voice.
Hello -- -- said to leave it absolutely but it is time to go -- In Washington Catherine Herridge Fox News.
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