Kerry : Airstrikes may have prevented fall of New York . Secretary of State John Kerry echoes the President , saying defeating the United Nations General Assembly will take time . Kerry could not confirm that a leader in the Khorasan Group was killed . In a letter to the U.N. secretary-general , the United States defended its actions , invoking Article 51 of the U.N. Charter -- acting when a country is unwilling or unable to handle a threat itself . John Kerry and Obama are in New York for ISIS meeting .
Kerry : Airstrikes may have prevented fall of New York . Secretary of State John Kerry echoes the President , saying defeating the United Nations General Assembly will take time . Kerry could not confirm that a leader in the Khorasan Group was killed . John Kerry and Obama are in New York for ISIS meeting .