Pakistan

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PUBLISHED: 23:48 GMT, 23 April 2013 | UPDATED: 00:25 GMT, 24 April 2013 The suspected Boston Marathon bomber has admitted that he and his brother planted two bombs at the race - and had learned to ...

(CNN) -- Is al Qaeda looking to ground transportation as a promising target after the introduction of intense security measures for air travel? And are its supporters able to operate out of Iran ...

Nato chief Anders Fogh Rasmussen has called on Pakistan to combat militants who use the country as a launch-pad for attacks on neighbouring Afghanistan.

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A car bomb aimed at a Pakistani Shiite politician missed him but killed four other people Tuesday, hours after police defused an explosives-laden vehicle near the house where ex-leader Pervez Musharraf is being held, in the latest signs of simmering unrest in the country.

Armed MQ-9 Reaper drones, like this one in Afghanistan, will remain in Afghanistan’s skies even after the U.S.’ longest war formally ends in 2014. Photo: U.S. Air Force One of the major elements ...

Canadian authorities claim al-Qaida operatives in Iran directed a failed plot to attack a passenger train. Iran denies it has any links to the two suspects. What falls in between is Iran's complicated history with the terror group that has included outright hostility, alliances of convenience and even overtures by Tehran to assist Washington after the Sept. 11, 2001, attacks.

Editor's note: Peter Bergen is CNN's national security analyst, the author of "Manhunt: The Ten-Year Search for bin Laden -- From 9/11 to Abbottabad" and a director at the New America Foundation. ...

When Canada accused "al-Qaeda elements in Iran" of guiding the alleged plot to derail a train, the veil was briefly lifted on a tangled yet crucial relationship between Osama bin Laden's followers and Tehran.