The Agni 3 has a payload in excess of 2 tonnes at 3500 KM Range. It is not MIRV'ed. Why would it need a payload in excess of 2 tonnes? Even a 3 decade old megaton warhead weight falls well below 2 tonnes, 200 KT warheads are sub 1 tonne. Why then design a missile for a 2.5 tonne payload? Can we only speculate? Would the Indian defense establishment be happy with a 'puny' 200 KT yield when the Big five have demonstrated capability of several megatons albeit that anything excess of 2 megatons is overkill even for a large city? Our nuclear doctrine states devastating consequences against nuclear aggression. Hmm. Using deductive logic the only thing that makes sense is that India's ballistic missiles are designed to carry warheads of some pretty high yield. What does not make sense is, if that were the case our deterrent is based on untested megaton yield weapons. Spooky. If I were to follow the same line of reasoning, we will very highly likely see another round of testing soon. Santhanams 'leak' was just step one. The NSG behaving like a pack of school kids should only strengthen our resolve and necessity to test, the message clearly being, like it or not, the Big 5 days are over.