A two year old TV documentary, perhaps originally produced by and telecast on Aaj Tak, on the issue of illegal Bangladeshi immigration to India and its links to rising terrorist violence in many parts of the country. It is quite well researched and well made with interviews of many experts, on the ground investigations and hard data.
In the words of former CBI director Joginder Singh- India is ‘tolerating’ upto 5 crore(50 million) illegal immigrants on its soil.
p.s- The program is only in Hindi with no English subtitles. But if you have a working knowledge of Hindi it is not very difficult to follow.