Russian President Vladimir Putin attends a memorial service for Russian firearms designer Mikhail Kalashnikov in Moscow, Russia, Friday, Dec. 27, 2013. Kalashnikov died on Dec. 23 at the age of 94. His work as a weapons designer for the Soviet Union is immortalized in the name of the world's most popular firearm, the AK-47 assault rifle, which is often called "a Kalashnikov." (AP Photo/Sergei Chirikov, Pool)
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