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.

Jordan confirmed Saturday that its air force took part in strikes launched by the United States on Islamic State group targets in Syria in retaliation for the killing of three U.S. citizens earlier this month.

The Syrian government did not comment directly on the extensive American strikes targeting the Islamic State on Friday, but said it was intensifying its own efforts to fight the group.

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

U.S. President Donald Trump on Tuesday expanded a list of countries subject to a full travel ban, prohibiting citizens from an additional seven countries, including Syria, from entering the United States.

Defense Secretary Pete Hegseth on Friday announced the start of a military operation in Syria to “eliminate ISIS fighters, infrastructure, and weapons sites” following the deaths of three U.S. citizens in an ambush attack almost a week ago.