The Indian Space Research Organisation or ISRO is all set for the launch of India's largest ever rocket. The 630 tonne Geo Synchronous Satellite Launch Vehicle Mark III a brand new rocket which is ready for its maiden flight from Sriharikota on Thursday morning. NDTV'S Science Editor Pallava Bagla spoke exclusively to ISRO Chairman Dr.K. Radhakrishnan on the significance of this landmark launch.