India's Homegrown Terrorist Threat

Indian anti-terrorist police are facing a gigantic task.

They are trying to find out who has been carrying out the wave of bomb blasts in Indian cities that have killed and injured hundreds of people.

For Assignment, Chris Morris goes on the trail of the recent terror attacks and follows the investigation into who might be behind them.

He asks how big a threat they are and examines the capacity of the Indian security services to put a stop to them.