After terrorist attacks in France last year killed nearly 150 people, a commission investigated what authorities could have done differently. They are pushing for a U.S.-style counterterrorism agency.
In a series of early-morning raids, Australian counterterrorism police arrested five men in the Melbourne area Saturday, over their possible involvement in a plot to attack a memorial ceremony.
President Obama has launched a sustained, long-term military campaign against the Islamic State, also known as ISIS or ISIL. Four legal experts debate whether he had the constitutional power to do so.