A Russian serviceman stands guard near part of the wreckage of a Polish government Tupolev Tu-154 aircraft that crashed near Smolensk airport April 11, 2010. Polish President Lech Kaczynski's coffin returned home to a stunned nation on Sunday, a day after he and much of the country's political and military elite perished in a plane crash in Russia. REUTERS/Sergei Karpukhin (RUSSIA - Tags: DISASTER TRANSPORT POLITICS)