Two months after President Trump declared his summit meeting in Singapore with Kim Jong-un a complete success, North Korea has not yet even agreed to provide that list during private exchanges with Secretary of State Mike Pompeo, according to American and South Korean officials familiar with the talks.

Belfer Center Senior Fellow David E. Sanger examines the latest news on the scope and scale of Russian cyberwarfare.

Belfer senior fellow and National Security Correspondent David E. Sanger discusses the wide disconnect between President Trump and U.S. intelligence during the Helsinki summit.

In the first generation of the online revolution, the question would have seemed absurd. In his new book The Perfect Weapon: War, Sabotage and Fear in the Cyber Age, Belfer Center Senior Fellow David Sanger addresses why that question has become less outlandish.

For 70 years, the thinking inside the Pentagon was that only nations with nuclear weapons could threaten America’s existence. But that assumption is now in doubt: in a world in which almost everything is interconnected – phones, cars, electrical grids, and satellites – everything can be disrupted, if not destroyed. In THE PERFECT WEAPON, Belfer Center Senior Fellow and Adjunct Lecturer in Public Policy David Sanger, the New York Times national security correspondent, details how this new revolution, being conducted largely in secret, is reshaping global power.

The Pentagon has quietly empowered the United States Cyber Command to take a far more aggressive approach to defending the nation against cyberattacks, a shift in strategy that could increase the risk of conflict with the foreign states that sponsor malicious hacking groups.

President Trump has imagined himself at the center of high-stakes nuclear negotiations since at least the mid-1980s, when he tried, unsuccessfully, to persuade the Reagan administration that it needed a New York real estate deal maker to lead arms-control talks with the Soviet Union.

The vast scope of North Korea’s atomic program means ending it would be the most challenging case of nuclear disarmament in history. Here’s what has to be done to achieve — and verify — the removal of the nuclear arms, the dismantlement of the atomic complex and the elimination of the North’s other weapons of mass destruction.

As the Trump administration races to start talks with North Korea on what it calls “rapid denuclearization,” a top federal government adviser who has repeatedly visited the North’s sprawling atomic complex is warning that the disarmament process could take far longer, up to 15 years.

President Trump, increasingly concerned that his summit meeting in Singapore next month with North Korea’s leader could turn into a political embarrassment, has begun pressing his aides and allies about whether he should take the risk of proceeding with a historic meeting that he had leapt into accepting, according to administration and foreign officials.