Kabir Khan whose last film Ek Tha Tiger was about the life of a RAW agent is all set to cast Saif Ali Khan in a film about post 26/11 counter-terrorism. The film is to be written by Hussain Zaidi, the prominent crime writer whose scrupulously researched books have earlier been the basis of Anurag Kashyap’s Black Friday and Sanjay Gupta’s Shootout At Wadala. This wouldn’t be the first film Saif would be doing on global terrorism. He has earlier done Rensil d’Silva’s Kurbaan where he played a terrorist. In Kabir’s film that Sajid Nadiadwala will produce, Saif crosses over to the other side. Says a source, “Saif plays a counter-terrorist deputed to tackle a post-26/11 scenario. It’s a kind of extension to Salman Khan’s RAW agent’s role in Kabir Khan’s Ek Tha Tiger. But the politics of this film would be far more topical.” Saif, we have come to know from reliable sources, would be required to undertake remarkable research to get his data on counter-insurgency right. Says the source, “It’s a different world for Saif and producer Sajid Nadiadwala. Sajid has only done mass entertainers so far.” Bollywood diva Katrina Kaif will play the leading lady in the project.