Increasing Talibanisation of Pakistan and shifting of terror focus from Af-Pak region would pose a serious security threat to India in the next two years, Chief of Air Staff Air Chief Marshal N.A.K. Browne said in Bangalore on Saturday. "If the American troops and the International Security Assistance Force (ISAF) withdraw from Afghanistan as planned, 2013-14 are going to be crucial watershed years for India as far as the security of our western border is concerned," Mr Browne hinted.