India, Oct. 31 -- US President Donald Trump announced Wednesday night that the US will resume testing nuclear weapons for the first time since 1992. Just what kind of tests Trump envisages is not known, but his message was delivered hours ahead of his meeting with President Xi Jinping. A breakout of the informal global moratorium on nuclear testing would not be too far out for a President of the US (POTUS) who has trashed many other international norms, and plans to gut more.

A resumption of nuclear tests could be a huge opportunity for India, if it can seize the moment. It is not a great secret that the Indian nuclear arsenal, which rests on its nuclear doctrine, has a deep flaw. This is its claim to possess a weapon that failed its onl...