The IRA also targeted Manchester but this latest bombing is very different.
It's natural to want justice for heinous acts but compassion and tolerance is what will ultimately end the violence.
Children’s imaginations around events can be even more frightening than reality.
In the aftermath, we face difficult conversations about society, but we cannot shy away from them.
How to help people emotionally come to terms with the aftermath of a terrorist attack.
In the wake of the suicide bombing in Manchester, England, an expert on social networks explains why ties to other people help societies recover from traumatic events.
How a new mayor reacts when the unspeakable happens.
Social media was alive with offers of help: 'a bed for the night', 'a lift home', 'free taxi rides'.
An attack at Manchester Arena has sent shock waves around the world, and again raised questions about safety in public places.
A young boy is strapped with explosives and sent to detonate himself and those around him at a school. An expert on terrorism explains how and why children become embroiled in militant conflicts.
New research is narrowing the gap, creating technology with the detecting capabilities of canines but without the downsides of relying on a biological system.
Despite military successes against Boko Haram, Nigeria needs to face up to the unpalatable truth that military force alone will not win the deadly war, and start discussions about peace building.
Recent attacks in Paris and Brussels have taught the French some important lessons about how to deal with the threat of terrorism.
Lahore's Easter Sunday suicide attack is the latest chapter in Jamaat-ul-Ahrar's campaign against the Pakistani government – and people.
How easy is it to recognise a suspect from a CCTV image?
Who is fighting who – and why.
A suicide bombing in Turkey last week has pulled Ankara closer to the US in the fight against ISIS. It has also raised concerns about Kurds who are also being targeted by Turkish bombing raids.
Crowds have the potential to provide a "fourth emergency service" - but only if we let them.
Fundamentalists become warriors with a simple message of salvation that is found in a naïve and literal interpretation of ancient, sacred texts.