India is all set to begin its second journey to the moon with Chandrayaan-2 on July 15. This three-in-one mission involves an orbiter, a lander called Vikram and a rover named Pragyaan to decipher the secrets of the moon. This is the most complex mission ever to be undertaken by Indian Space Research Organisation (ISRO) as it involves soft landing on the south pole of the moon, an area where no other mission has ever gone before. ISRO chairman Dr K Sivan spoke exclusively to NDTV about the challenges of putting together this under-Rs. 1000 crore mission.