A Saudi official has told Reuters news agency that defense ministers from the U.S.-led coalition fighting ISIL have discussed the possibility of a ground incursion in Syria. Such a move would mark a major escalation in the U.S.-led campaign, which has so far involved airstrikes and arming Syrian rebels. State Department spokesperson John Kirby said the United States would welcome the possibility of a Saudi ground force in Syria, but “there’s a lot of homework that needs to be done.”