Law enforcement called for public to continue reporting suspicions to prevent extremist attacks.
French media's decision to no longer publish attackers' names and images is a step forward in counter-terrorism.
An additional 23,000 troops and police officers will be deployed at tourist destinations.
Senator Chris Murphy vows to remain on the floor until his Republican colleagues compromise on two gun control issues.
Four people were arrested in Birmingham and one person at London's Gatwick airport.
The European Court of Human Rights has ruled the shooting of Jean Charles de Menezes was 'lawful'.
Richard Clarke tells NPR the iPhone could already be cracked by NSA, FBI and Justice Department are solely in it to set legal precedent.
One of the neighborhoods targeted was Molenbeek, which police also raided after the Paris attacks.
The Justice Department is considering legal changes to combat domestic anti-government extremists.
The 900 detainees were questioned over various offences ranging from drug possession to traffic violations.
New research says that the group runs domestic cells and training camps in Europe.
Vigorous independent oversight of counterterrorism activities sacrifices neither liberty nor security.
Obama has provided regular, public updates about national security since the December 2 attack in San Bernardino.
Mayor Bill de Blasio said Monday that New York is the country's "chief terror target" and vigilance is needed every day.
The man allegedly boasted of killing people to other asylum seekers.
Although the research aimed at tracking and disabling drones is at an early stage, there has been at least one field test, according to sources.
"Many (potential terrorists) are not networked. They're not in a group."
President Hollande announced that the budget would rise by €3.8bn over four years.
As security at churches increases following foiled Paris attack, experts say current levels of protection are unsustainable.
Gadahn, charged with treason and providing material support to terrorists in 2006, was killed in U.S. counterterrorism operations in January.
Four family members were in the same group as Waheed Ahmed, who arrested yesterday upon his return.
Waheed Ahmed was detained Turkey before being arrested at Birmingham Airport.