Hi, we have to sign the CTBT (comprehensive test ban treaty) administered by the IAEA as a part of the 123 agreement, which means, no more tests! US, France, Russia & UK have already performed scores of tests and have all the info that can be used to perform just simulations on the computer for new tests. But, India/Pak don't have this luxury. We may have to do couple of tests, if not more, to be able to do simulations... Signing the 123... is like losing part of our sovereignty. We have already lost some of it by consuming Coca cola, McNuggets, KFChicken,etc. and watching CNN, etc. :-)!
