In the eyes of Mike Pompeo, the day was shaping up to be one of his most commanding displays of diplomacy since becoming secretary of state. Months of planning had finally yielded a meeting among reluctant European officials, Arab leaders and the Israeli prime minister to strategize over confronting Iran.

The United States ambassador to NATO nearly set off a diplomatic incident on Tuesday when she suggested that the United States might “take out” Russian missiles that it views in violation of a longstanding arms control treaty.

Before the end of the day she was forced to issue a statement saying she did not mean to suggest that Washington was considering a pre-emptive strike against Russian missile sites.

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.

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.