A woman walks past a currency exchange booth in downtown St. Petersburg, Russia, Thursday, Sept. 22, 2011. The Russian ruble plunged to the lowest level in nearly two years under the impact of falling... more 
A woman walks past a currency exchange booth in downtown St. Petersburg, Russia, Thursday, Sept. 22, 2011. The Russian ruble plunged to the lowest level in nearly two years under the impact of falling prices of oil, the main source of the nation's export revenues. (AP Photo/Dmitry Lovetsky) less 
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Associated Press | Photo By Dmitry Lovetsky
Thu, Sep 22, 2011 1:43 PM EDT