GUWAHATI, July 12? The Airport Authority of India (AAI) is spending over Rs 30 crore per year for arranging adequate security cover in all operational airports in the North Eastern region, while it is incurring heavy losses from its operations in the region. The Regional Executive Director of AAI, Sri Srikrishan informed newsmen here that in view of the security threat in the insurgency-hit north eastern region, AAI has to avail of ?very expensive? service of Central Industrial Security Force (CISF) to look after security in airports at Guwahati, Jorhat, Dibrugarh, Bagdogra and Agartala. AAI...