Russia's Prime Minister Vladimir Putin swims in a lake in southern Siberia's Tuva region August 3, 2009. Putin, a judo black belt who has flown in a fighter aircraft and shot a Siberian tiger in the wild, plunged into the depths of Lake Baikal aboard a mini-submersible on Saturday in a mission that added a new dimension to his macho image. Picture taken August 3, 2009. [Agencies]