Over the past couple of days, India's North-East, more specifically Assam has taken centrestage in Parliament. It has got all the ingredients that political parties are lapping up - identity politics, the othering of large groups of people, the suspense of what will happen to 40 lakh people, and the possible villains - infiltrators. Tonight, a Reality Check on the claims made by BJP chief Amit Shah who has termed all 40 lakh people infiltrators.