(NBC News) U.S. fighter jets were back over the skies of Iraq Friday, dropping bombs on Islamic militant targets.
Two F/A-18 fighter jets flying from the U.S.S George H.W. Bush dropped 500 pound bombs on ISIS militants near the city of Erbil in the first strike.
The attack knocked out artillery the ISIS fighters were were using to shell Kurdish forces in Erbil, close to the U.S. consulate there.
President Obama promised Thursday military action would be taken if the Islamic militants were a threat to Americans.
Humanitarian aid flights are also dropping supplies to thousands of stranded Yazidis, an Iraqi minority facing genocide at the hands of ISIS fighters.