NEW DELHI, Jan. 21 -- The 15th Pravasi Bharatiya Divas (PBD) convention kicks off today in Varanasi. Nearly 6,000 overseas delegates are flocking to the holy city to celebrate their Indian connection for three days. India has 31.2 million diaspora living in 208 countries, about 70% of them in nine countries: the US (4.46 million), Saudi Arabia (4 million), Malaysia (2.4 million), and the United Arad Emirates (2.8 million)....