Vladimir Putin has buffed up his action-man image and raised the pin-up stakes among world leaders with another set of bare-chested holiday pictures. Photographs were published today showing the Russian Prime Minister stripped to the waist and riding a horse imperiously through rugged terrain during a brief holiday in the Siberian region of Tuva. Wearing only green fatigues, his eyes hidden behind reflective sunglasses, Mr Putin also showed his gentler side as he fed the horse from his hand after the ride. Mr Putin, who will be 57 in October, showed off a set of rippling arm muscles as he...