Lisa Smith from Dundalk (to right of taoiseach and Chief of Staff)  converted to Islam and moved to Syria. Photograph: Bryan O’Brien

Lisa Smith, the 37-year-old Irish woman and former soldier who married an Isis fighter and now wants to return to Ireland, is emblematic of a problem (...)

 February 2016:  a man holds up an iPhone displaying a “No Entry” image as part of a rally in front of an Apple store in New York in support of the company’s privacy policy. Photograph: Justin Lane/EPA

At first, the attack on a Christmas party in San Bernardino, California, in December 2015 seemed like a “conventional” mass shooting – a disgruntled (...)

Members of Iranian forces take cover during an attack on the Iranian parliament in central Tehran, Iran. Photograph: Tasnim News Agency/Handout/Reuters

Iran’s Revolutionary Guards ratcheted up the tensions with Saudi Arabia as it accused its regional rival of involvement in Wednesday’s double terroris(...)

A man reacts as people gather to observe a minute of silence in memory of the victims of the Brussels airport and metro bombings, on the Place de la Bourse in central Brussels. Photograph: AFP

Brussels was struck Tuesday by major, apparently coordinated terrorist bombings, at the airport and on the metro system, killing at least 31 people an(...)

Khadiza Sultana, Shamima Begum and Amira Abase passing through security at Gatwick Airport before flying to Turkey. Photograph: Metropolitan Police via The New York Times

The night before Khadiza Sultana left for Syria the teenager was dancing in her bedroom. It was a Monday during the February school vacation. Her n(...)

An estimated  12,000 fighters from 74 nations have traveled to Syria and Iraq to fight with extremist groups. In this file photograph a member loyal to the Islamic State in Iraq and the Levant (ISIL) waves an ISIL flag in Raqqa. Photograph: Reuters

The UN Security Council plans to demand countries “prevent and suppress” the recruitment and travel of foreign fighters to join extremist militant gro(...)