Tahawwur Hussain Rana, a key figure in the 2008 Mumbai terror attacks, has been extradited from the US to India and produced before a Delhi court. Rana, a close associate of David Coleman Headley, was brought to India after the US Supreme Court dismissed his review plea against extradition. The National Investigation Agency (NIA) has sought 20 days of custody to interrogate Rana, citing clinching evidence, including emails. The agency believes that Rana's interrogation is critical to understanding the larger conspiracy behind the attacks and his role in planning them.