Warning Pakistan that homegrown terror turns itself on the host country ultimately, Britain today asked Islamabad to ensure that it brought the 26/11 perpetrators to justice. Answering questions from strategic thinkers at an interaction in New Delhi, British Secretary of State for Defence Liam Fox said, it is dangerous to accept at face value the terrorists' claim of being a natural ally. Fox said, those, who use one country to export transnational terrorism to another, will ultimately be willing to unleash it on the host country itself. He said, Prime Minister David Cameron has been very clear on this issue, that Pakistan must ensure, those responsible for the outrage in Mumbai are brought to justice.