BJP today asked the government to immediately seek formal extradition of David Headley from the United States. Briefing media-persons in New Delhi on Thursday, party spokesman Ravi Shankar Prasad said that Headley must be tried in India for the massacre of the innocent people on 26/11 in Mumbai. He said, Headley's trial in India is very important as in his plea bargain request, he has named the L-e-T operators and also many serving officers of Pakistan.<br/>