From Fox News:
The United States, joined by several Arab allies, launched an intense campaign of airstrikes, bombings and cruise-missile attacks against Islamic State targets in Syria Monday night – marking the first U.S. military intervention in Syria since the start of that country’s civil war.
Sources say the military operation includes fighter jets, B-1 bombers and Predator drones, as well as Tomahawk missiles launched from the Red Sea and Persian Gulf.
Officials say the coalition is targeting about 20 sites, including command-and-control centers, training camps and weapons depots.
U.S. officials told Fox News that several Arab countries – including Saudi Arabia, Jordan, Bahrain and the United Arab Emirates – were participating.