The president said U.S. airstrikes, combined with military expertise, would be more effective in defeating the group that calls itself the Islamic State.
The disparities in naming are partly because of translation difficulties, and partly a sign of a propaganda war. The group calls itself the Islamic State; the Obama administration goes with ISIL.
The militant group calling itself the Islamic State claims to have killed British aid worker David Haines. The video has been condemned by British prime minister David Cameron and by President Obama.
President Obama says the strategy the U.S. would pursue against the Islamic State would be similar to how it targets al-Qaida affiliates in Yemen and Somalia. But both countries are deeply unstable.
Lincoln, Neb., is home to a sizable group of Iraqi Yazidis, members of the minority group being persecuted in Iraq. One of them, Sulaiman Murad, describes the agony of watching the crisis from afar.