Obama vows to keep up military pressure on Islamic State
Speaking at the U.N. General Assembly, Obama said Islamic State must be destroyed.
On Ukraine, Obama said that if Russia takes the path of peace and diplomacy, then the United States would lift its sanctions.
He also called for many more countries to make concrete commitments to fight the deadly Ebola outbreak in West Africa.
(Reporting by Steve Holland and Louis Charbonneau; Writing by Michelle Nichols; Editing by Howard Goller)