I agree in toto with Major. We must have access to all energy sources.
Without an agreement with US, no other country can supply to us. But after the agreement, India can buy from any of the NSG countries incld. Russia, China, Australia.
Please also keep in mind that the world is becoming more and more interdependent. No country incld. India & US can say that they are not dependent on the others.Ultimately your strength will determine the level of co - operation. And India is a strong country and is well moving in the right direction.