Although cyber weapons can usually be employed in a far less lethal manner than guided missiles shot from a drone, they have been deployed less frequently and under rules of engagement that are far less clear, at least to the public.

President Trump is expected to overrule his top national security advisers and decline to certify the Iran nuclear agreement, according to people who have been briefed on the matter, a decision that would reopen a volatile political debate on Iran but is likely to leave in place the landmark deal negotiated by the Obama administration.

The war of words between President Trump and Kim Jong-un, North Korea’s leader, raised concerns on Friday that it could escalate into a new and more volatile phase as the White House weighed its next steps in response to a threat by Pyongyang to conduct the world’s first atmospheric nuclear test in 37 years.

A look at North Korea's latest rounds of missile tests with David Ignatius of the Washington Post, David Sanger of The New York Times, Lionel Barber of the Financial Times, and Nicholas Burns of Harvard's John F. Kennedy School of Government.

A little more than a year after the Russian effort to interfere in the American presidential election came to light, the diplomatic fallout — an unraveling of the relationship between Moscow and Washington on a scale not seen in decades — is taking its toll.

"When President-elect Donald J. Trump said on Twitter in early January that a North Korean test of an intercontinental ballistic missile capable of reaching the United States “won't happen!" there were two things he still did not fully appreciate: how close Kim Jong-un, the North’s leader, was to reaching that goal, and how limited any president’s options were to stop him."

What started out as a counterintelligence investigation to guard the United States against a hostile foreign power has morphed into a political scandal about what Mr. Trump did, what he said and what he meant by it. 

Harvard University Distinguished Service Professor and former Harvard Kennedy School Dean Joseph S. Nye was honored  by the Center’s Cyber Security Project in April for his leadership and contributions to cybersecurity through the Belfer Center’s cybersecurity initiatives. Nye has announced his retirement at the end of the semester.

"Belfer Center Newsmakers" highlights members of the Belfer Center community who have been featured recently in the news.

WASHINGTON — President Obama and Secretary of State John Kerry have a simple explanation for their surprising success in getting Iran to dismantle much of its nuclear infrastructure, ship out 98 percent of its nuclear fuel and release five American prisoners: Patient diplomacy, backed by escalating economic sanctions, accomplished more than military action ever could have.