The country's first tribal tourism circuit was inaugurated by Union Minister of State for Tourism KJ Alphons in Dhamtari district of Chhattisgarh yesterday. <br />''<br />''Addressing the function, the Minister said, unprecedented work is being done by the central government in tourism sector. In the last four years, the foreign exchange earnings from foreign tourist increased by 20 percent. <br />''<br />''Mr Alphons said, the government's target is to double the number of tourists in the next three years.<br />''<br />