Home Secretary G K Pillai says the probe in the 26/11 case will be completed within four to six weeks by the National Investigation Agency and a chargesheet will be filed after that. Speaking to media at New Delhi, Mr Pillai also said that FBI is cooperating and will respond to a list of questions given by the Home Ministry. The Federal Bureau of investigation (FBI) has charge sheeted David Headley, a US national of pakistani origin with six counts of conspiracy to bomb places in India and Denmark and for providing material support to terrorist plots.<br/> <br/>Asked if India would seek access from the United States to David Headley, Pillai said, once NIA files the chargesheet, India will definitely be seeking access both for interrogation and a subsequent stage for his extradition.<br/> <br/>The MEA spokesperson said applying facile distinctions amongst LeT, HuJi and Al Qaeda can only be counter-productive in the fight against terrorism, which cannot be selective. He also pointed out that that the investigations into the Headley case highlight the significance of the need for timely transparent and effective international cooperation for defeating terrorism.<br/><br/>