Charlie D’Agata; Major Garrett; 'Building Art'

CBS News correspondent Charlie D’Agata reports from Iraq on the U.S. airstrikes on suspected ISIS targets in Sinjar. Journalist Major Garrett discusses the upcoming presidential primaries debate. Pulitzer Prize-winning architectural critic Paul Goldberger is joined by Frank Gehry to discuss a new biography, "Building Art: The Life and Work of Frank Gehry."