The beheading of an American brings the ISIS threat closer to home. But is President Obama doing enough to stop them? Senators Lindsey Graham and Jack Reed on what the U.S. should do next.

The militant who killed American James Foley has a British accent, and there are reports that more British Muslims are fighting for ISIS than British forces.   We talk to Peter Westmacott, the British Ambassador to the United States about the alarming numbers of Westerners fighting in Iraq and Syria.

Missouri Governor Jay Nixon remains under fire for his handling of the situation in Ferguson.  He joins us with the latest on the investigation.

Ferguson’s troubles resonate along the thin blue line.  We convene police chiefs from across the country to discuss: Thomas Manger, Chief of Police in Montgomery County Maryland and Vice President of the Police Executive Research Forum, Malik Aziz, Deputy Chief of Police in Dallas and Chair of the National Black Police Association, and James Craig, Chief of Police in Detroit.

Watch State of the Union with Candy Crowley, Sunday at 9a and Noon on CNN.