AGARTALA, June 6 -- Union home minister Amit Shah said on Friday that the Centre would not allow demographic changes in Tripura, West Bengal and Bihar through illegal infiltration and asserted that the government is strengthening border security through technology-driven measures. He also said that the government's "smart border" project is in its final stage. Addressing Border Security Force (BSF) personnel at the Lankamura Border Outpost in West Tripura district, Shah said the government is committed to sealing gaps along the country's borders and preventing infiltration. "The demographic change, be it in Tripura, or West Bengal, or Bihar... we shall not allow demographic change through the holes of the country's border. This is our firm ...