The Islamic State's war on Europe seems to have entered a dangerous new phase, evolving from highly coordinated operations on the grand boulevards of Paris and Brussels to amateur assaults.
Brussels remained on high alert Monday with increased security after a weekend sweep that left three in jail facing terrorism charges, including relatives of two of the March 22 suicide attackers.
The number of people linked to the Islamic State network that attacked Paris and Brussels reaches easily into the dozens.
The arrest of five men suspected of links to the Brussels bombings sheds new light on how the attacks in the Belgian capital were linked to Paris.
All of Europe was looking for Abdelhamid Abaaoud, the planner of the Paris attacks. One woman helped him plan the carnage; another woman turned him in.
Belgian prosecutors launched a public appeal Thursday seeking any information on "the man in a hat" seen before the Brussels Airport suicide bombings.
In the space of a week, extremist terror struck four cities around the world. Terrorism affects many nations - all of them facing different challenges.
Belgian riot police clashed Sunday with hundreds of hooligans at a temporary shrine honoring victims of the Brussels suicide bombings.
An expert's analysis of the complex subject of international political negotiations with regards to terrorists' actions and reactions.
Sylvia Longmire explains why the USA rushed to console France and Belgium when people also died recently in terror attacks in Turkey, Nigeria and Syria.