For both the shooting that killed two U.S. soldiers and a civilian contractor in Palmyra last Saturday and separate shootings that killed 15 people at a Hannukah celebration the following day at Sydney’s Bondi Beach,

The do-it-yourself model was professionalized and has been really deployed around the world by ISIS, inspiring dozens of people to carry out attacks in their name,” one expert tells NBC News.

Deadly Syria attack kills two U.S. service members, intensifying pressure on Trump to reassess counter-ISIS strategy and partnership with Ahmed al-Sharaa.

Last Saturday, an Islamic State infiltrator ambushed a meeting between American soldiers and their local counterparts in a Syrian desert town. Two members of the Iowa National Guard and a U.S. civilian interpreter were killed in the assault—whose perpetrator may or may not have known that the subject of the meeting was how to counter ISIS.

The retaliatory strikes came one week after an ISIS gunman killed three Americans, including two Iowa National Guardsmen and a U.S. civilian interpreter.

The police found two homemade Islamic State flags in the car of the suspects, a 50-year-old man and his 24-year-old son.

Canadian police say Waleed Khan faces terrorism charges for allegedly conspiring with ISIS and committing hate crimes targeting Jewish community in Toronto.

ISIS attacks over the past week in Australia and Syria have led some to wonder whether the Islamist terrorist organization, once also known as the Islamic State, is making a comeback. “Actually,” says Bruce Hoffman, “it never went away.”