HIDUR (Chhattisgarh ), April 20 -- Shells of bullets, both on the ground and lodged in trees; a grenade from an under barrel grenade launcher; shoes and bloodstained clothes left behind in a hurry-the spot of the encounter that left 29 Maoists dead in Kanker district of Chhattisgarh on Tuesday is strewn with signs of the fierce exchange between the insurgents and security forces that raged for over four hours. The exchange of fire marked the most significant single incident blow to the rebels in eight years and the biggest ever in Chhattisgarh....