Policemen and forencic police work inside a marked out perimeter at the scene.
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Expert: Belgian security services struggling
Counterterrorism expert Glenn Schoen speaks to CNN Today about the need to share counterterrorism intelligence between European nations.
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Thwarted terror plots 16 videos
Policemen and forencic police work inside a marked out perimeter at the scene.
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Expert: Belgian security services struggling
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Man accused of plotting attack at parade
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Armed police operate in Saint-Denis, a northern suburb of Paris, Wednesday, Nov. 18, 2015. Police say two suspects in last week's Paris attacks, a man and a woman, have been killed in a police operation north of the capital. Two police officers have been injured in the standoff. Police have said the operation is targeting the suspected mastermind of last week's attacks, believed to be holed up in an apartment in Saint-Denis with several other heavily armed suspects. (AP Photo/Francois Mori)
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What to do in the event of a terror attack
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The psychology of terror
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LAS VEGAS, NV - OCTOBER 02: An ambulance leaves the intersection of Las Vegas Boulevard and Tropicana Ave. after a mass shooting at a country music festival nearby on October 2, 2017 in Las Vegas, Nevada. A gunman has opened fire on a music festival in Las Vegas, leaving at least 20 people dead and more than 100 injured. Police have confirmed that one suspect has been shot. The investigation is ongoing. (Photo by Ethan Miller/Getty Images)
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When is something 'terrorism'?
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Four arrested in alleged airplane terror plot
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Washington, UNITED STATES: The terrorist threat advisory is seen 10 August, 2006 at Ronald Reagan National Airport, in Washington, DC. After Britain said 10 August it had thwarted a plot to wreak "mass murder" by the simultaneous mid-air bombings of planes to the United States, the US raised the threat level to "severe" or "Red" for all commercial flights flying from Britain to the United States, and "high" or "Orange" for all commercial aviation operating in the United States, including international flights. AFP PHOTO / TIM SLOAN (Photo credit should read TIM SLOAN/AFP/Getty Images)
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What FBI director wants Americans to know about terror
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Investigators inspect a truck following a shooting incident in New York on October 31, 2017. Several people were killed and numerous others injured in New York on Tuesday when a suspect plowed a vehicle into a bike and pedestrian path in Lower Manhattan, and struck another vehicle on Halloween, police said. A suspect exited the vehicle holding up fake guns, before being shot by police and taken into custody, officers said. The motive was not immediately apparent. / AFP PHOTO / Don EMMERT (Photo credit should read DON EMMERT/AFP/Getty Images)
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The vulnerability of 'soft targets' to terror
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The operations center of the Terrorist Screening Center
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An exclusive look inside the Terrorist Screening Center
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From the left, British businessman Chris Norman, Anthony Sadler, a senior at Sacramento University in California, French President Francois Hollande, U.S. Airman Spencer Stone, and Alek Skarlatos a U.S. National Guardsman from Roseburg, Oregon pose at the Elysee Palace, Monday Aug.24, 2015 in Paris, France. Hollande pinned the Legion of Honor medal on U.S. Airman Spencer Stone, National Guardsman Alek Skarlatos, and their years-long friend Anthony Sadler, who subdued the gunman as he moved through the train with an assault rifle strapped to his bare chest. The British businessman, Chris Norman, also jumped into the fray. (AP Photo/Michel Euler, Pool)
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Train heroes honored for thwarting attack
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Is this terror or a mass killing?
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How vulnerable are citizens to terror attacks?
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In this photo provided by Christina Cathleen Coons, a person lies on the floor after an incident on a high-speed train traveling from Amsterdam to Paris on Friday, Aug. 21, 2015. A gunman opened fire on the train wounding several people before American passengers subdued him, according to officials and one of the Americans involved. (Christina Cathleen Coon via AP)
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Exclusive cell phone video from inside train
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FBI: Several July 4th terror attacks thwarted
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American teen arrested in alleged ISIS plot
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New details released in Boston terror plot
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