ISLAMABAD - Former President of Pakistan and President of Pakistan People’s Party Parliamentarians Asif Ali Zardari yesterday said that Karsaz incident was the biggest tragedy in Pakistan. Paying homage to the martyrs of the October 18 tragedy, he said that sun of democracy was able to shine again on Pakistan owing to the sacrifices made by the martyrs on Oct 18. In a statement, the former President said that Benazir Bhutto fought a war with extremists, exploiters and enemies of her homeland. Zardari said that Benazir Bhutto fought for restoration of the 1973 constitution, empowered parliament and rights of the people all her life. He said that PPP was the representative and advocate of the oppressed classes and will continue to fight against injustices.