Abu Bakr al-Baghdadi.
Islamic State video/EPA
From US captive to head of Islamic State, the life of Abu Bakr al-Baghdadi, who died in Syria.
French soldiers patrol the streets following an attack in Strasbourg.
AP Photo/Christophe Ena
An analysis reveals that using terrorism may not be very effective in achieving long-term political goals, when compared to other peaceful means.
Social isolation feeds into extremism and terrorism.
Who is a terrorist?
A scholar asks: If two acts of violence kill similar numbers of people, have similar effects on victims and communities, and spread fear and terror, should they not be seen as equally abhorrent?
It’s almost impossible to adequately protect soft targets like public gatherings.
'Crowd' via www.shutterstock.com
Because physical security can only do so much, communities have a role to play.
A girl leaves flowers for victims of an attack at Manchester Arena.
To the terrorist, children have become but a means to an end. Weapon and target.
Injured people are assisted after an incident on Westminster Bridge in London.
Was the London attacker acting alone? Was he really a soldier of the Islamic State? Research on the nature of jihadism in the West reveals possible answers.
A woman holds a flag as she looks out over the National Sept. 11 Memorial and Museum.
Data on violent incidents in the US reveal that our focus on Islamist extremism since 9/11 may be misguided.
Italian police at a press conference after Berlin attacker was killed in Italy.
AP Photo/Luca Bruno
The Berlin terror attack at the end of 2016 will have major political implications for Germany's elections this year and an uneasy European Union, writes a German studies scholar.
Iraqi special forces soldier advancing toward Mosul, Iraq.
AP Photo/Khalid Mohammed
What happens to the Islamic State if it loses the battle for territory in Iraq and Syria? Here's a list of ways it might go down.
New York Mayor Bill de Blasio and Governor Andrew Cuomo at the site of an explosion in Chelsea, New York.
A year of violence continues with bombs in NYC and a stabbing in Minnesota, leaving many asking, why? A psychologist explains what research has revealed about the minds of violent extremists.
15 years on after the September 11 terrorism attacks, research shows global terrorism can give some companies competitive advantages while destroying others.
The effects of terrorism on businesses are wide ranging but some are learning how to adapt to risk and use it to their competitive advantage.
Imam Syed Shafeeq Rahman of the Islamic Center of Fort Pierce speaks with the media following a prayer for victims of the Orlando shooting.
Because Muslim Americans are an extreme 'outgroup,' they're all the more vulnerable to discrimination, especially in the wake of negative media coverage.
Schematic diagram of an aggregate made up of linked users, with the mathematical equation that describes this online pro-ISIS ecology.
A new mathematical model of ISIS supporters' online behavior provides insights into how cyberactivity relates to real-world attacks.
Prepaid cellphones are just one of many technological tools used by criminals and terrorists.
flip phone image via shutterstock.com
Throwaway phones are just one piece of the ever-widening technological arsenal of extremists and terror groups of all kinds.
Minorities are increasingly facing exclusion from Pakistan's public realm; and it's not only terrorists who are responsible.
Does the media’s coverage of events such as the Sydney Lindt cafe siege deserve more scrutiny?
In an age of radicalisation, there needs to be a radical rethinking of which stories the media tells, and how.
A masked man speaking in what is believed to be a North American accent in a video released by Islamic State militants.
Digital media and the model of "leaderless resistance" enhance the threat by the Islamic State here at home.
Social media used to lure teenagers to join the fight in the Middle East.
A war of words is being waged on social media by terrorist groups trying to recruit Australian teenagers to join the fight in the Middle East.
Bullet holes from the Copenhagen attack.
Liselotte Sabroe/Scanpix Denmark/Reuters
What makes some communities more vulnerable to the use of violence than others?