Reuters
Politics
 - Obama apologizes to Karzai on Koran burning
 - Romney clawing his way back in Republican race
 - Republican candidates back arming Syria rebels
 - China says ready to improve U.S. military ties
 - White House unveils plan to protect online privacy
 - Congress members threatened with biological attack
 - Obama urges corporate tax cut, closing loopholes
 - Analysis: Obama goes on offense over high gasoline prices
 - Listen up voters, Congress is messaging you
 - Romney proposes 28 percent top income tax rate
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