Overview: 2011/10/12 Headlines: U.S. Accuses Iran Agents of Plot to Assassinate Saudi Ambassador; Senate Defeats Obama Jobs Bill; Occupy Wall Street Marches on Billionaire Homes; 6 Occupy Protesters Arrested in Senate Building; 21 Arrested in Chicago; Video Footage Shows Police Confronting Occupy Boston Protesters, Veterans; Supreme Court Decision Rejects Death Penalty for Mumia; GOP Candidates Debate Economy; Christie Endorses Romney in GOP Race; Israel and Hamas Confirm Prisoner Exchange Deal; Red Cross: "Chaotic" Situation at Sirte Hospital; At Least 25 Killed in Series of Bombings in Baghdad