nEW dELHI, April 25 -- Congress leader Rahul Gandhi on Wednesday called the caste census his "life mission" and said that it will be the first task his party will take up if elected to power. He also hit back at Prime Minister Narendra Modi and the Bharatiya Janata Party (BJP) over the wealth redistribution controversy saying that they are in "panic mode" after reading the Congress's "revolutionary" manifesto and asserted that the party aims to provide relief to 90 per cent of Indians by reclaiming a portion of the Rs 16 lakh crore provided as loan waivers to 22-25 big businessmen by the BJP....