U.S. President Barack Obama vowed to help hunt down terrorists behind Friday's Paris attacks, at a news conference ahead of the summit in Turkey.
The comments came after 129 people were killed in Paris on Friday by gunmen and suicide bombers in an attack claimed by Islamic State.
Experts say French security services are already stretched thin after reportedly following some 6,000 people in the aftermath of the Charlie Hebdo attack earlier this year.
Tour operators brace for cancellations in France but analysts expect global markets to recover quickly.
Washington already expects France to retaliate by taking on a larger role in the U.S.-led coalition’s bombing campaign against Islamic State.
However, her rival Bernie Sanders received a lot of support in post-debate polls.
A day after more than 120 people were killed in Paris, major questions are unanswered after the worst terrorist attack in Europe in 11 years.
O'Malley, under pressure to have a breakout moment at tonight's Democratic debate, also used the name at the first debate.
Right out of the gate, the debate heavily focused on the terror networks of the Islamic State.
French President Francois Hollande and U.S. Secretary of State John Kerry use "Daesh" to refer to the Islamic State -- some argue that everyone else should.
Draw a letter, compose an email or put together a care package to be delivered to troops in December.
The Western military alliance could invoke Article 5, which declares an attack against one ally to be an attack against all, security experts said.
Nick Alexander, 36, was among more than 80 people killed at a performance by a California group called Eagles of Death Metal.
The shift to a national security theme for Saturday's Democratic face-off will likely play to the strengths of the Vermont senator's rival, Hillary Clinton, a focus group said.
Three French citizens were apprehended as the search for anyone connected to Friday’s deadly attacks in Paris expanded beyond France’s borders.
A discussion is set for the meeting on Sunday to talk about the Paris terror attacks.
The unspecified measures follow the terror attack on the Stade de France in Paris, where a soccer game was taking place on Friday.
Station chiefs said that it was important for the debate to go on because the world looks toward the American president in times of international crisis.
Across the world, prominent Muslim leaders criticized the Islamic State group's deadly attacks in Paris, calling for international cooperation in the fight against terrorism.
Anwar Abu Zeid, a police officer, was allegedly under severe mental stress at the time he killed five people, including two American police trainers.
The terrorists had ties to Egypt and Syria, as well as Belgium and France, according to a prosecutor in Paris.
"If our country is threatened or being encroached, we Malaysians should rise to defend our country," Malaysia's deputy prime minister says.