Iran, Myanmar, Russia and Syria failed to uphold chemical weapons treaty commitments, the State Department reported.
Human Rights Watch, Amnesty International and Russian scientific experts are among those affected by the restrictions.
Russia and the United States are fulfilling their treaty commitments despite tensions over Ukraine.
Since Russia invaded Ukraine, Western officials have voiced concern about the potential for a chemical incident or attack in the war-torn country.
President Vladimir Putin has threatened the possible use of nuclear weapons should other states interfere in Russian war in Ukraine. How can the international community meet the urgent challenges from such threat of use of nuclear weapons?
Russian President Vladimir Putin’s decision to launch a massive assault on independent, democratic, non-nuclear Ukraine has unleashed a war that has killed thousands, displaced millions, and raised the risk of nuclear conflict.
New hostilities between Russia and the West highlight the need for a more robust mechanism, including arms control measures, to address the danger.
There is no hope of dealing constructively with the defining security crisis of a generation if Russia and the West are not willing to compromise.
The recent brandishing of nuclear threats evokes the early days of the Cold War when such threats were the modus operandi of superpower conduct.
With its invasion stalled, Russia has raised the alert level of its nuclear forces and employed nuclear-capable hypersonic arms for the first time.
Amid concerns that Russia could use weapons of mass destruction (WMD) in Ukraine, a group of U.S. national security officials is mulling potential responses.
The Russian invasion has sharply raised the risks of nuclear catastrophe.
Biden has apparently failed to seize his opportunity to meaningfully narrow the role of nuclear weapons and failed through his Nuclear Posture Review.