The US has assured India that it can interrogate David Headley who has pleaded guilty to his involvement in the Mumbai terror attacks. Headley is now in US custody. <br/> <br/>US Attorney General and Head of the Department of Justice Eric Holder spoke to Mr Chidambaram and clarified to him about a number of aspects concerning Headley's plea bargaining. <br/> <br/>US Assistant Secretary of State for South and Central Asia Robert Blake, also said that Indian investigators will be allowed to interrogate David Headley. <br/> <br/>Mr Blake, however, said that the US will not extradite Headley either to India or Pakistan or Denmark for the charges for which he has now admitted guilt. <br/> <br/>Mr Blake said Washington thinks that it is very important for Pakistan to tick off the LeT threat, not just because of the security and stability of the US, but also India and other countries.<br/>