Security personnel train at a counter-terrorism and jungle warfare school in Kanker village, about 140 km (87 miles) south of the central Indian city of Raipur March 19, 2007. Thousands of tribal people in this central state of Chhattisgarh have seen ancestral lands turned into a war zone of landmines, ambushes and refugee camps as a 40-year-old Maoist insurgency in India gathers momentum. The region is now a stronghold of up to 4,000 well-armed Maoists, police say, who freely roam the forests of southern Chhattisgarh in what locals call the "red zone". Picture taken March 19, 2007. To match feature INDIA-MAOISTS/TRIBALS