FILE - This Oct. 31, 2012, file photo, shows police officers detaining an opposition activist during an unsanctioned protest rally in St. Petersburg, Russia. Tensions between the U.S. a

 

              FILE - This Oct. 31, 2012, file photo, shows police officers detaining an opposition activist during an unsanctioned protest rally in St. Petersburg, Russia. Tensions between the U.S. a
FILE - This Oct. 31, 2012, file photo, shows police officers detaining an opposition activist during an unsanctioned protest rally in St. Petersburg, Russia. Tensions between the U.S. and Russia have been rising. The countries have been at odds over Syria’s civil war, Iran’s nuclear program and Russia’s crackdown on domestic opposition. U.S. officials are uneasy about what they see as a more assertive foreign policy by Vladimir Putin, who returned to the Russian presidency in May. (AP Photo/Dmitry Lovetsky, File)