The National Investigation Agency is probing suspected LeT operative David Coleman Headley and his companion Tahawwur Hussain Rana's links with 26/11 Mumbai attack. Based on details provided to the NIA by the FBI, the NIA is likely to question the film personalities who allegedly knew Headley. Investigation has revealed that Headley attended several big parties during his visits to India. The parties include film launches as well as those hosted by film stars. In these parties, Headley met several top-ranking officials, including police and customs officials, and introduced himself as a well-known Canadian industrialist. Meanwhile, Headley's gymn instructor Vilas Warak, through whom Rahul Bhatt had come in contact with Headley voluntarily went to the Joint police Commissioner Rakesh Maria and told him everything he knew about Headley.<br/> <br/><br/>