Trump strongly rejects international cooperation. Round 2 is underway.
The U.N. and other organizations expect a second round of reduced U.S. support and engagement with Trump's return.
Intermediate-Range Nuclear Forces (INF) Treaty 1987
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International arms control at a 'crossroads' over nuclear threats
Despite his concerns about Russia and China and the "unraveling" of the international arms controls regimes the world has long depended on, the NATO chief emphasized the need to negotiate new arms control arrangements.
Geneva hosts U.S.-Russia security talks
Diplomats from the U.S. and Russia held a new round of discussions in Geneva seeking ways to defuse rising tensions and to avoid a new nuclear arms race.
Open Skies lapse weakens U.S.-Russia ties
Russia withdrew from a treaty meant to lower the risk of conflict between Western nations and post-Soviet Russia, soon after the U.S. abandoned it.
Russia to withdraw from Open Skies Treaty
Russia announced plans to withdraw from the Open Skies Treaty, two months after U.S. President Donald Trump's administration abandoned it.
Trump dismisses Putin's New START offer
Russian President Vladimir Putin offered to extend the New START treaty as is, but U.S. President Donald Trump's administration called it a "non-starter."
Trump pushes New START before election
U.S. President Donald Trump appeared to be pushing for a foreign policy win before Election Day, seeking to renew a nuclear arms control deal with Russia.
Nationalism rejected on 75th A-bomb anniversary
On the 75th anniversary of the first atomic bombing, Hiroshima's mayor called on world leaders to ban atomic weapons and boost international cooperation.
U.S.-Russia nuclear weapons talks restart
U.S.-Russia nuclear talks resumed after more than a year, despite unknown factors like China's non-participation and a U.S. presidential election.
Trump order meant to hold up ICC probe
U.S. President Donald Trump signed an executive order authorizing sanctions against ICC officials who investigate alleged U.S. war crimes in Afghanistan.
Trump to pull U.S. from surveillance treaty
The United States announced it is withdrawing from a treaty that permits mutual unarmed surveillance flights over 34 nations.
Munich summit questions 'Westlessness'
Fears of a divided West challenged by China are a challenge and opportunity for multilateralism to show its worth, a three-day summit in Munich concluded.
Macron maps post-Brexit E.U. nuclear role
French President Emmanuel Macron put forward a new doctrine for France to lead the European Union in reducing the global threat of a nuclear arms race.
Millenials fear nuclear attack in ICRC poll
More than half of all people reaching adulthood in the early 21st century believe it more likely than not a nuclear attack will occur in the coming decade.
New U.S. "Space Force" may test space law
America's "Space Force," the military's first new branch in more than 70 years, could breach space law and prompt a U.S. withdrawal from yet another treaty.
Russia offers renewal of New START treaty
Russian President Vladimir Putin offered to immediately renew the New START nuclear weapons treaty between his country and the U.S. It expires in 2021.