Following the terrorist attacks that took place recently in Paris, President Barack Obama and American allies will be meeting at a security summit.

The event will take place on Feb. 18 in Washington, according to Reuters. U.S. Attorney General Eric Holder confirmed the news on Sunday.

"We will bring together all of our allies to discuss ways in which we can counteract this violent extremism that exists around the world," Holder said.

Holder met with European officials in Paris. At that meeting, European interior ministers agreed something had to be done to stop terrorist attacks.

"We all agree that we need to put in place better control on certain passengers, on the basis of objective criteria and with respect for fundamental liberties and without disrupting cross-border travel," French Interior Minister Bernard Cazeneuve said.

Cazeneuve added the countries need to work together in order for all to have information on passengers. He believes a database is the way to achieve this.

"We are convinced of the need for such a tool, to follow those who travel to terrorist operating theaters or who return from there," he said.

In France, a rally took place on Sunday, according to The Associated Press. Additionally, on Saturday, hundreds of thousands honored the victims by marching from Toulouse to Rennes.

The wire service said that events like this were a "huge security challenge" after the violence that has impacted the country. In three days, 17 people and three gunmen were killed.

Gunman Amedy Coulibaly's widow, Hayat Boumediene, may possibly have more answers about the attack. She is thought to be an accomplice, and police are searching for her. She is reportedly in Syria.

According to Mediaite, CNN sources said Boumediene was not even in Paris when the attacks happened.