Can the U.S. rally more partners against Islamic State?

Aired: 9/24/2014 | 0:12:34 | Clip
Will President Obama’s U.N. speech and Security Council resolution resonate with leaders of Muslim countries and others around the world? Chief foreign affairs correspondent Margaret Warner offers an update from the United Nations and Jessica Tuchman Mathews of the Carnegie Endowment for International Peace and Raghida Dergham of Al-Hayat join Gwen Ifill for analysis.