Dr R. Chidambaram with Dr. Kalam. Chimdambaram is a metallurgist who is known for his integral role in India's nuclear weapons program

Kalam was one of the few young scientists sent by Dr Vikram Sarabhai for training of ‘sounding rockets’ at the National Aeronautics Space Agency in the US. When he reached Thumba in 1964, Kalam had little to fall back on.

Dr R. Chidambaram with Dr. Kalam. Chimdambaram is a metallurgist who is known for his integral role in India's nuclear weapons program; he coordinated test preparation for the Pokhran-I and Pokhran-II. (Source: Express archieve)