India, Nov. 4 -- US President Donald Trump's remark expressing intent to resume testing of nuclear weapons after a gap of at least three decades has reopened a debate on such tests and the effectiveness of the 1996 Comprehensive Nuclear Test Ban Treaty (CTBT), and has been perceived in some quarters as bordering on the irresponsible. During an interview, Trump claimed that secret testing by China, Russia, North Korea and Pakistan is reason enough for the US to resume the detonation of nuclear devices to test their efficacy. CIA director John Ratcliffe has reiterated US assessments that Russia and China were carrying out low-yield nuclear tests. As the leader of the most powerful country in the world, what Trump says will be taken seriousl...