By H. K. Dua There comes a time when those who have taken upon themselves the responsibility to lead a nation or a cause have to bite the bullet and move on to achieve the desired aim. That time has come for Dr Manmohan Singh to see that the Indo-US Nuclear Deal he signed with George W. Bush gets operationalised before the end of his tenure as also that of the US President. Dr Manmohan Singh signed the nuclear deal three years ago, after which its follow-up has seen plenty of ups and downs, drift and uncertainty, which do not enhance the credibility of his government at home, or of the country abroad. Not seeing the nuclear deal through its final stages and allowing it to lapse will amount to India reneging on an agreement, which this nation has not done even once since Independence. Dr Manmohan Singh is not a politician of the familiar kind and is known to be sensitive that not finalising the deal will give an impression that he had gone back on the commitment he had made on behalf of his country. The nuclear deal has been stymied by the Left not necessarily because it will have no spin-offs for India, but mainly because of the fear that it may push India into the American fold