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.
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.
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 announced plans to withdraw from the Open Skies Treaty, two months after U.S. President Donald Trump's administration abandoned it.
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."
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.
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 talks resumed after more than a year, despite unknown factors like China's non-participation and a U.S. presidential election.
U.S. President Donald Trump signed an executive order authorizing sanctions against ICC officials who investigate alleged U.S. war crimes in Afghanistan.
The United States announced it is withdrawing from a treaty that permits mutual unarmed surveillance flights over 34 nations.
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.
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.
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.
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.
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.
U.S. President Donald Trump sowed division with American partners before departing a NATO summit and leaving it to other leaders to put on a united front.
