Guwahati: Home Minister Amit Shah on Friday said the BJP will keep its promise to make the country free of infiltrators. Addressing a programme in Guwahati on the birth centenary of Assam's first non-Congress CM Golap Borbora, he said the high-power demography mission, announced by PM Narendra Modi on Independence Day, is a definitive step towards studying the demographic pattern of the country and identifying infiltrators. "We had made a promise to Assam, but we have not been able to fulfil it in 10 years.