The absence of Prime Minister Manmohan Singh and his counterparts from Canada and Mauritius has cast a shadow over the three-day CHOGM summit that begins In Colombo on Friday (Nov 15) amid allegations of human rights violations against the Tamils in Sri Lanka's war against the LTTE. Unfazed by repeated references to the "war crimes" and the demand for an independent investigation into them, Sri Lankan President Mahinda Rajapaksa has picked on the opportunity to host the summit of the 53-nation grouping to showcase the peace in the last four years after the elimination of the Liberation Tigers of Tamil Eelam (LTTE).