Indian President Dr Mukherjee paid India's tribute to South African anti-apartheid icon Nelson Mandela.President was accompanied by a high-level delegation including UPA Chairperson Sonia Gandhi and Leader of Opposition Sushma Swaraj to pay homage to Madiba, as Mandela was affectionately called. Indian President said Mandela was an icon of irreversible social and economic change - the kind of transformation and emancipation that his people had only dreamt...