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In Iran on Tuesday, students and other protesters stormed the British Embassy in the capital Tehran, smashing windows, throwing firebombs and burning the British flag. The crowd had gathered at the embassy to protest new severe economic sanctions imposed by Britain, cutting off all banking with Iran. Renee Montagne talks with Washington Post reporter Thomas Erdbrink, who is in Tehran.

(New material based on NPR reporting added to the top of this post at 12:30 p.m. ET.)

Republican presidential candidate Herman Cain is reassessing his campaign but still plans to move ahead at this time, his Iowa campaign director tells The Associated Press and NPR.

In October, President Obama announced that most U.S. troops would be out of Iraq by the end of 2011, after negotiations with Iraqi leaders failed to extend the troops' presence. Only Marine embassy guards and liaison troops will stay behind in the country, where more than a million troops, in total, have served over the past eight years.