Rick Perry and Mitt Romney attack each other’s conservative credentials in the third Republican debate. The Fed moves to lower interest rates by purchasing long-term bonds. A possible government shutdown looms as the House of Representatives passes a funding bill that Senate Democrats vow to reject. Home sales go up but remain weak. Gays can now serve openly in the military as “Don’t Ask, Don’t Tell” officially ends. The controversial execution of Troy Davis in Georgia despite worldwide appeals for clemency puts capital punishment back in the spotlight. And Twitter starts selling political ads. A panel of journalists joins guest host Steve Roberts for analysis of the week’s top national news stories.