US cites heightened threat after Afghan bombing EU hits Syria with more sanctions G20 inches toward $2 trillion in rescue funds Student gunman kills 1 person wounds 4 others in Ohio The President to propose cut in corporate tax rate US embassy on lockdown amid Kabul protests Eurozone on the brink of recession Existing home sales at 1-1/2 year high, supply falls Fitch downgrades Greece on debt swap plan Growth concerns weigh on stocks, oil edges up Transcript: Marie Colvin's final CNN interview Fannie Mae Freddie Mac legal bills $110 million paid by taxpayers Outspoken NJ Gov. Chris Christie says Warren Buffett should just "shut up"