Bangalore terror plot: Gaps in the story?

About a fortnight ago, over a dozen men were picked up from Bangalore, Hyderabad, and Nanded in Maharashtra in connection with a terror plot which had in its sights on major installations all over South India and some VIP targets. The suspects are all in their mid-twenties and well educated. So what's the back story behind this spurt in terror in South India and is the face of terror changing? Watch this special report by NDTV's Sudhi Ranjan Sen.