New Delhi, Apr 20 (ANI): United States' Assistant Secretary of State for South and Central Asian Affairs, Nisha Desai Biswal, said US Foreign Direct Investment (FDI) could double if India liberalizes its investment regime. She made the statement while speaking on 'US investing in India's growth' at an event organised by the University of Chicago's New Delhi centre. Biswal said India's economy had a major impact on the world economic growth.