Source:Reuters News-Santorum takes heavy fire in Arizona Republican debate | Obama urges corporate tax cut, closing loopholes | Assad forces renew barrage on Syria's Homs | Fitch downgrades Greece on debt swap plan | Congress members threatened with biological attack | Judge strikes down law mandating sale of | Home resales at 1-1/2 year-high, supply falls | Iran defiant as U.N. nuclear talks fail | U.S. advisers back experimental obesity pill | Japan cuts in Iran crude imports could be over 20 percent |
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