US must not become complacent to a growing terrorism threat, a Counterterrorism Center official says
The rampage, which killed 14 people, was the deadliest attack on U.S. soil in years and was inspired by the Islamic State ...
FBI investigates New Orleans attacker's radicalization and premeditated actions
After a truck drove into a crowd on New Year's in New Orleans, killing 14 people, the FBI has continued to look into the man ...