The New York Times reports: Three years ago, President Barack Obama ordered Pentagon officials to step up their cyber and electronic strikes against North Korea’s missile program in hopes of sabotaging test launches in their opening seconds.

Soon a large number of the North’s military rockets began to explode, veer off course, disintegrate in midair and plunge into the sea. Advocates of such efforts say they believe that targeted attacks have given American antimissile defenses a new edge and delayed by several years the day when North Korea will be able to threaten American cities with nuclear weapons launched atop intercontinental ballistic missiles.

But other experts have grown increasingly skeptical of the new approach, arguing that manufacturing errors, disgruntled insiders and sheer incompetence can also send missiles awry. Over the past eight months, they note, the North has managed to successfully launch three medium-range rockets. And Kim Jong-un, the North Korean leader, now claims his country is in “the final stage in preparations” for the inaugural test of his intercontinental missiles — perhaps a bluff, perhaps not.

An examination of the Pentagon’s disruption effort, based on interviews with officials of the Obama and Trump administrations as well as a review of extensive but obscure public records, found that the United States still does not have the ability to effectively counter the North Korean nuclear and missile programs. Those threats are far more resilient than many experts thought, The New York Times’s reporting found, and pose such a danger that Mr. Obama, as he left office, warned President Trump they were likely to be the most urgent problem he would confront. [Continue reading…]