As the world reels in the wake of a massacre in Paris, world leaders have vowed to fight ISIS. It isn't clear, however, what exactly that fight will entail.

Thousands of soccer fans at Wembley Stadium showed solidarity with France Tuesday, joining in singing of 'La Marseillaise', the French national anthem.

A Chilean mother and her daughter, cut down in a concert hall while the daughter's 5-year-old son survived. A young Italian woman, separated from her boyfriend and friends when the concert erupted in chaos.

The hacker collective Anonymous declared war against the Islamic State group Saturday after a series of brutal attacks in Paris on Friday killed 129 people and injured hundreds more.

The only surviving member of the Islamic State cell that attacked Paris in November 2015 refused to rise for a Belgian court on Monday, or answer questions about his actions.

Security measures have continued to increase at the popular French film festival following terrorist attacks in France in recent years.

Early projections indicate that Centrist Emmanuel Macron and far-right leader Marine Le Pen are set to face each other in a May 7 runoff.

A year after Islamic State suicide bombers killed 32 people in Brussels, Belgian authorities say much remains unclear about who ordered the attacks.

The Eiffel Tower, one of the world's most famous landmarks, will get a glass wall built around its base under a plan to provide extra protection against terrorist attacks, a source in the Paris mayor's office said on Thursday.

The Islamic State group is likely to carry out new attacks in the European Union in the near future, EU police agency Europol said in a report published Friday.