New Delhi, Oct. 31 -- The National Investigation Agency (NIA) has sent a request to the US seeking additional details in its probe against 26/11 Mumbai attacks co-conspirator Tahawwur Hussain Rana based on his interrogation in India, people familiar with the development said on Thursday. A formal request, seeking certain specific details on Rana, has been sent through mutual legal assistance treaty (MLAT). An officer who didn't want to be named said although a supplementary charge sheet was filed in the case in July this year but "we needed some more information based on his interrogation as the investigations are continuing"....