Hijjah, 1431/Nov 26, 2010, SPA --Prime Minister Manmohan Singh Friday pledged to redouble efforts to bring the perpetrators of Mumbai terror attacks to justice as India paid homage to the martyrs on the second anniversary of the carnage, as PTI reported. Union Home Minister P Chidambaram paid tributes to those killed in the attacks by laying a wreath at the martyrs' memorial at Police Gymkhana in south Mumbai. "On this day of remembrance, we salute the courage, unity and the resolve of ordinary Mumbaikars and the brave and selfless action of our men in uniform during the attack," he said in a statement in New Delhi. Singh said, "It is this spirit and strength of character of the Indian people that will defeat such forces that seek to threaten our social fabric and way of life". "We will never succumb to the designs of our enemies. We pledge to redouble our efforts to bring the perpetrators of this crime against humanity to justice," he said Noting that Mumbai was subjected to a brutal terrorist attack that claimed the lives of hundreds of innocent people, he said the nation joins the bereaved families in remembering and mourning those who perished in this barbaric attack.