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arms control and limitation and disarmament

Russia Is Moving Ahead With Missile Program That Violates Treaty, U.S. Officials Say

Russia Is Moving Ahead With Missile Program That Violates Treaty, U.S. Officials Say

President Vladimir V. Putin of Russia during a visit to Kazakhstan this month.

United Nations Committee Calls for Outlawing Nuclear Weapons

United Nations member states voted overwhelmingly to approve a resolution calling for negotiations on a treaty that would outlaw nuclear weapons, despite strong opposition from nuclear-armed nations.
Donald Trump and the U.N.: Signs of Clashing Views on Many Issues

Donald Trump and the U.N.: Signs of Clashing Views on Many Issues

The Security Council chamber at the United Nations building in New York. The United States’ allies are trying to learn how Donald J. Trump will approach the pressing crises that are sure to come up
Trump Says the U.S. Should Expand Its Nuclear Capacity

Trump Says the U.S. Should Expand Its Nuclear Capacity

President Vladimir Putin with his senior military officials in Moscow on Thursday.
Sidney Drell, Who Advised Presidents on Nuclear Weapons, Dies at 90

Sidney Drell, Who Advised Presidents on Nuclear Weapons, Dies at 90

Sidney D. Drell received the National Medal of Science from President Obama in 2013 for his contributions to physics and the government.
Sidney Drell, Who Advised Presidents on Nuclear Weapons, Dies at 90

Sidney Drell, Who Advised Presidents on Nuclear Weapons, Dies at 90

Sidney D. Drell received the National Medal of Science from President Obama in 2013 for his contributions to physics and the government.
The Interpreter: Trump, Promising Arms Race, Could Set World on Uncertain Path

The Interpreter: Trump, Promising Arms Race, Could Set World on Uncertain Path

President Vladimir V. Putin of Russia could loosen restrictions on the use of nuclear weapons in response to a new arms race.
Jeremy Stone, Who Influenced Arms Control During Cold War, Dies at 81

Trump Can’t Renegotiate Iran Nuclear Deal, Rouhani Says

The president of Iran said the deal could not be modified, in part because it was also signed by Britain, China, France, Germany and Russia.
Unease in Colombia, as Old Enemies Become New Neighbors

Unease in Colombia, as Old Enemies Become New Neighbors

Tierra Grata, a settlement in La Paz, Colombia, where former rebels have moved. This year, 7,000 across the country are to surrender their guns.
Russia Deploys Missile, Violating Treaty and Challenging Trump

Russia Deploys Missile, Violating Treaty and Challenging Trump

President Vladimir V. Putin of Russia last week. Russia’s reported deployment of a new type of missile presents another challenge to its relations with the United States.
The Interpreter: Fearing U.S. Withdrawal, Europe Considers Its Own Nuclear Deterrent

The Interpreter: Fearing U.S. Withdrawal, Europe Considers Its Own Nuclear Deterrent

A technician under the French nuclear aircraft carrier Charles De Gaulle. In Europe, there is talk of forming a joint nuclear deterrent in the event the Trump administration withdraws American
Russia Has Deployed Missile Barred by Treaty, U.S. General Tells Congress

Russia Has Deployed Missile Barred by Treaty, U.S. General Tells Congress

Gen. Paul Selva, left, the vice chairman of the Joint Chiefs of Staff, after a House Armed Services Committee hearing on Wednesday.
Russia Has Deployed Missile Barred by Treaty, U.S. General Tells Congress

Russia Has Deployed Missile Barred by Treaty, U.S. General Tells Congress

Gen. Paul Selva, left, the vice chairman of the Joint Chiefs of Staff, after a House Armed Services Committee hearing on Wednesday.

Tillerson on N. Korea: ‘20 Years of Failed Approach’

Speaking at a news conference in Tokyo, Rex W. Tillerson, the secretary of state, said on Thursday that the escalating threat from North Korea’s nuclear program showed a clear need for a "different
U.S. General Urges Nuclear Upgrade as Russia Grows ‘More Aggressive’

U.S. General Urges Nuclear Upgrade as Russia Grows ‘More Aggressive’

Russian soldiers in 2014 in the Crimea region of Ukraine. Lt. Gen. Jack Weinstein, who oversees the American nuclear arsenal, attributed the increased tensions with Russia largely to its actions under
U.S. General Urges Nuclear Upgrade as Russia Grows ‘More Aggressive’

U.S. General Urges Nuclear Upgrade as Russia Grows ‘More Aggressive’

Russian soldiers in 2014 in the Crimea region of Ukraine. Lt. Gen. Jack Weinstein, who oversees the American nuclear arsenal, attributed the increased tensions with Russia largely to its actions under
United States and Allies Protest U.N. Talks to Ban Nuclear Weapons

United States and Allies Protest U.N. Talks to Ban Nuclear Weapons

Nikki Haley, the United States ambassador to the United Nations, spoke on Monday outside the nuclear weapons ban talks, flanked by Alexis Lamek, left, France’s deputy United Nations ambassador, and
The Interpreter: India, Long at Odds With Pakistan, May Be Rethinking Nuclear First Strikes

The Interpreter: India, Long at Odds With Pakistan, May Be Rethinking Nuclear First Strikes

A test of India’s long-range, nuclear-capable missile in 2013. India is said to be considering allowing for pre-emptive nuclear strikes against Pakistan in the event of a war.