For years, terrorism experts believed bin Laden was hiding in the lawless territory of northwest Pakistan.
And terrorism experts are revising their view of the source of the danger.
Anti-terrorism experts say it never should have happened, and that specially trained bomb-sniffing dogs could have provided a low-tech way to detect such items.
But counter-terrorism experts worry about the consequences of America's success.
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Still, terrorism experts see agroterrorism, defined as the intentional contamination of the food supply with a goal of terrorizing the population and causing harm, as an increasing operational risk.
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Counter-terrorism experts differ as to how the attackers - in several pickup trucks - may have reached In Amenas, but there are several roads and tracks across uninhabited desert from Libya.
The government is said to be working with counter-terrorism experts from several countries - including the US and UK - in an attempt to neutralise the threat posed by Boko Haram and Ansaru, amid fears that they could worsen instability across West and central Africa.
Anti-terrorism experts told BBC News Online that they were surprised at the ease with which three of the four attackers were able to escape from the Oasis compound in Khobar, despite the overwhelming numerical superiority of the security forces and the tactical and logistical advantages which they enjoyed.
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They've arrested more than 150 people around the country, but none of those arrests has been directly linked to terrorism, and experts say the vast majority of people who use hawala are harmless.
That concern was reflected by the participation in this conference of such prominent officials and top experts on terrorism and law enforcement and their eagerness to address these and other threats.
Politics aside, experts point out that classifying an attack as terrorism carries important legal and investigative meaning.
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The takeover stoked fear among global security experts that Mali could become a new hub for terrorism.
Those events stoked fear among global security experts that Mali could become a new hub for terrorism.
Romney, just barely, fills the potential bill for a national leader, if he surrounds himself with wise experts on foreign policy, national defense, the threat of terrorism.
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The hearing, called by Senator Jon Kyl (R-AZ), Chairman of the Senate Judiciary Subcommittee on Technology, Terrorism and Homeland Security, heard expert testimony from the FBI, the Treasury Department, and two independent experts including Alex Alexiev of the Center for Security Policy.
We welcomed the progress in the implementation of the activities of the five ADMM-Plus Experts' Working Groups (ADMM-Plus EWGs) to facilitate cooperation in maritime security, counter terrorism, humanitarian assistance and disaster relief, peacekeeping operations and military medicine.
WHITEHOUSE: Joint Statement of the 4th ASEAN-U.S. Leaders' Meeting
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