A man donates blood at a blood transfusion station in Russia's southern city of Stavropol, for the victims of Monday's bomb explosion at Moscow's Domodedovo airport January 26, 2011. Prime Minister Vladimir Putin vowed revenge on Tuesday for the suicide bombing that killed at least 35 people at Russia's busiest airport and underscored the Kremlin's failure to stem a rising tide of attacks. REUTERS/Eduard Korniyenko (RUSSIA - Tags: CRIME LAW TRANSPORT POLITICS HEALTH)