Canada gunman classified as a ‘high-risk traveler’

(Sean Kilpatrick / AP)

The shooter killed a soldier and opened fire inside the Parliament building, shocking a country that rarely sees gun violence.

    U.S. to train Syrians only in defensive role

    U.S. to train Syrians only in defensive role

    Officials do not believe the units will be able to seize towns from the Islamic State without the help of U.S. combat troops, which President Obama has ruled out.

    Any mention of ‘Navy SEALs’ barred in probe of silencers

    Any mention of ‘Navy SEALs’ barred in probe of silencers

    A federal trial examines a shadowy military contract involving unmarked silencers that is deemed classified.

    Four Blackwater guards convicted in Iraq deaths

    Four Blackwater guards convicted in Iraq deaths

    The U.S. contractors killed 14 unarmed Iraqis in Baghdad in 2007, one of the most ignominious chapters of the war.

    Video of militants recovering weapons airdropped by U.S. may be real

    A new review determined that a video released by the Islamic State may indeed depict weapons the U.S. attempted to airdrop for use by Kurdish forces.

    Ben Bradlee’s proud -- and humorous -- legacy in the U.S. Navy

    Ben Bradlee’s proud -- and humorous -- legacy in the U.S. Navy

    The legendary Washington Post executive editor was shaped by his experience on a destroyer during World War II combat.

    American detainee released by North Korea

    American detainee released by North Korea

    Jeffrey Fowle was arrested after he left a Bible at his hotel.

    U.S., Iraq planning offensive operation to retake territory

    The plan, described as methodical and time-consuming, will not begin in earnest for several months.

    NSA Secrets

    FILE - This June 6, 213 file photo shows the sign outside the National Security Agency (NSA) campus in Fort Meade, Md. The NSA has broken privacy rules or overstepped its legal authority thousands of times each year since Congress granted the intelligence agency broad new powers in 2008, The Washington Post reports. In one case, telephone calls from Washington were intercepted when the city's area code was confused with the dialing code for Egypt.  (AP Photo/Patrick Semansky, File)

    Revelations and reaction

    The National Security Agency has been forced to respond to unprecedented disclosures about its surveillance programs. Those programs have been assailed as a violation of privacy rights by critics and defended as critical to U.S. national security by intelligence officials. Explore our coverage.

    Coexistence of aggressive interrogation and civil liberties

    Coexistence of aggressive interrogation and civil liberties

    Panetta argues that “enhanced” interrogations were fruitful, but so were techniques without duress.

    In Ukraine, dueling executions -- and propaganda about them

    In Ukraine, dueling executions -- and propaganda about them

    The Ukrainian military and pro-Russian separatists have both been accused of atrocities -- but there’s a propaganda war going on, too.

    Benghazi suspect pleads not guilty to new murder charges

    Benghazi suspect pleads not guilty to new murder charges

    Ahmed Abu Khattala was ordered held without bond.

    Does this mysterious video show the Islamic State flying a fighter jet?

    Numerous versions of the nine-second clip have been circulating on the Internet since Saturday.