President Obama confirmed Tuesday that the U.S. and a handful of regional partners had carried out airstrikes overnight against ISIS in Syria, marking a significant escalation in the nation's military campaign against the Sunni militant group.
"The strength of this coalition makes clear: This is not America's fight alone," he said.
In brief remarks delivered from the White House before he left for the U.N. General Assembly, Obama said 40 nations had offered to aid the effort, and that there was bipartisan support in Congress for continued strikes.
"The overall effort will take time," he said. "There will be challenges ahead. But we'll do what's necessary to take the fight" to ISIS.