President Barack Obama talks about his administration's counter-terrorism policy at the National Defense University at Fort McNair in Washington, May 23, 2013.

Cemetery in the village of Utamysh, in the southern Russian region of Dagestan, where locals buried the Canadian citizen William Plotnikov after he was killed in a shootout with Russian counter-terrorism forces in July 2012. Photo taken April 26, 2013.

FILE - In this Monday, April 15, 2013 file photo, a South Korean army soldier aims his machine gun during an anti-terrorism drill against possible terrorists' attacks at a subway station in Seoul, South Korea. In his 16 months on the job, North Korean leader Kim Jong Un’s government has raised fears with unusually aggressive threats against Seoul and Washington, and it’s not clear whether he will be able to pull back, a feat perfected by his late father, considered a master at brinkmanship. The mystery surrounding Kim's intentions has some outsiders predicting nightmare scenarios. (AP Photo/Ahn Young-joon, File)

A local community debates the creation of a United States State Department anti-terrorism training facility on farmland adjacent to their homes in Ruthsburg, Maryland. The residents against the facility claim the driving tracks, firing ranges and explosive charges at the facility would destroy the quiet of the community of roughly 400 residents.

Terrorism suspect Faisal Shahzad, seen on a TV screen as Attorney General Eric Holder, Homeland Security Secretary Janet Napolitano, FBI Deputy Director John S. Pistole and New York City Police Commissioner Ray Kelly hold a briefing regarding the investigation into the Times Square bomb plot in Washington on May 4, 2010

A counter-terrorism exercise of Shanghai Cooperation Organization.

A terrorism drill in New Jersey.

Officials bring in a terrorism suspect at the Durham Regional Police station in Pickering, Ont.

VIRTUAL REALITY: Images glorifying terrorism aim to inspire insurgents

Ibrahim Hassan al-Asiri, a fugitive Saudi bombmaker who is believed to be working with al-Qaeda's Yemen-based terrorism cell and is a key suspect in the parcel-bomb plot against the U.S.

Members of Indonesia's elite anti-terrorism squad walk at a village where a suspected terrorist hideout was raided in Klaten, Central Java, Indonesia, Wednesday, June 23, 2010. The elite anti-terrorism squad arrested Indonesia's most wanted man and two other suspects Wednesday after raiding their hide-out on the country's main island of Java, police and witnesses said.

Shaikh Muhammad Tahir-ul-Qadri delivers a fatwa against terrorism at the Institution of Mechanical Engineers in London on March 2, 2010

Bush and Cheney, pictured in October 2001, planned the war on terrorism but broke over whether to pardon one of its key architects

Pakistan President Pervez Musharraf addressed the nation on Saturday hours after imposing emergency rule, saying terrorism and extremism had reached their limit and his country's sovereignty was at stake.

FIGHTER: Zia has led the belated battle against terrorism

ANGER AND GRIEF: Demonstrators rally against terrorism in Moscow's Red Square.

Captives from last week's raid: "Pakistan is determined to root out terrorism"

Abubakar Ba'asyir, leader of the Indonesian Mujahidin Council, denies any involvement in international terrorism

An Royal Canadian Mounted Police officer stands in the rear of 359 Cherokee Blvd in north Toronto after seizing property in connection with an alleged Al-Qaeda sponsored terrorism plot to derail a passenger train between New York City and Toronto, Apr 22, 2013.

New York City Police Department Counter Terrorism Unit officers patrol in Times Square on May 5, 2010

Police outside Westminster Magistrates' Court, London, as nine men arrive to appear in court charged with conspiracy to cause explosions in the United Kingdom other terrorism offences Monday Dec. 27, 2010.

Russian arms trafficking suspect Viktor Bout, center, is in U.S. custody after being extradited from Thailand to face terrorism charges in New York.

Mansur Shabwani Dalil, left, and Hedi Mubarak al-Saleh, both suspected al-Qaeda members, await trial in a Yemeni court specializing in terrorism on July 4, 2010

Italian prosecutor Armando Spataro speaks to a Milan court on Nov. 4, 2009, at the end of the trial of 26 Americans in the 2003 abduction of terrorism suspect Osama Moustafa Hassan Nasr

FBI agents arrest suspects Najibullah Zazi, center, and his father Mohammed Zazi, not pictured, on charges of knowingly making false statments to the FBI in a matter involving terrorism

Terrorism suspects Khalid Sheikh Mohammed, left, and Abu Zubaydah

The Great Unknown: A plane takes off from Gatwick Airport outside London the day after a major counter-terrorism sting.

FIRING RANGE: Iraq's elite Counter Terrorism Force trains in Baghdad

TAKING CHARGE: Indonesia's new President, Susilo Bambang Yudhoyono, says he will crack down on terrorism and corruption

Signs point the way within the Counter-terrorism Center's maze of offices

Powell speaks on 'Patterns of Global Terrorism'

Bush signs the anti-terrorism bill into law

Zacarias Moussaoui is set to spend the rest of his life in total seclusion in Colorado's ADX Supermax prison for a range of charges relating to conspiring to commit acts of terrorism.