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Also: Poll shows dead heat between Romney, Obama; Secret Service continues investigation into agents' conduct in Colombia; Ozzie Guillen returns to the dugout in Miami.

Also: Obama, Romney campaigns continue to spar over tax returns; U.K. and Sweden criticize Ecuador for giving asylum to Assange.

Also: Refugees race to escape fighting in Syria; Palestinians outraged by Romney's comments; grid failure cuts power to 370 million in India; McCain dismisses Cheney's criticism of Palin pick.

Also: IMF chief warns of a "lost decade;" Greece's prime minister is expected to resign today; and Wal-Mart plans an ambitious expansion into medical care.

Also: U.S. resumes drone strikes against targets in Pakistan; Australian billionaire says he's building "Titanic II;" chances of military action against Iran are lower, experts say.

Also: Chicago teachers' strike continues; Buckingham Palace takes legal action over topless photos of Kate; Occupy movement marks one-year anniversary; new iPhone sets sales record.

Also: Winter storm leaves behind a mess in the Northwest; News International reportedly pays some targets of its snooping; insurgents kill dozens in Southern Afghanistan.

Also: Helicopter crash kills six U.S. Marines in Afghanistan; Afghan soldier kills four French troops; search of Costa Concordia suspended.

Also: Skype to make chats and user data more available to police; Obama and Romney differ over gun control; Chinese politician's wife charged with murder.

Peter Carey and Rachel Kushner are among those who are withdrawing in protest from the PEN American Center's annual gala. Kushner says she is uncomfortable with Charlie Hebdo's "cultural intolerance."