Grossi vows IAEA will 'never abandon' its attempts to clarify the presence of nuclear material at several undeclared Iranian sites, as Tehran urges closure of probe

PM and visiting German chancellor discuss Ukraine as Israel maintains cautious approach to Russian invasion; at Yad Vashem, Scholz says Germany has responsibility to Jewish state

Senate majority leader, who was one of four Democrats to vote against 2015 pact, makes first public comments on matter since coming out against Trump's 2018 withdrawal

Assertion by Tehran's nuclear chief contradicts reported draft terms of accord being negotiated in Vienna, which are said to restrict enrichment to 5%

Degree of Putin's frustration with US opposition to his incursion will dictate whether he prioritizes deal to prevent nuclearized neighbor over effort to push back against the West

Ali Bagheri warns that no matter how close talks in Vienna are to revival of 2015 pact, they can still fail until agreement is inked; top Iranian nuclear official to meet with IAEA

With Russia's invasion of Ukraine, the world order is being remade, US hegemony is no longer assured, and we are reminded to take seriously foes closing in on the ultimate weapon

Oman has helped facilitate back-door diplomacy between the US and Iran; senior visit raises speculation of Oman's future involvement in Vienna negotiations

Foreign minister tells CNN that Western powers need to be 'realistic' but Tehran is serious about wanting to reach an agreement

At Munich Security Conference, German chancellor criticizes Tehran for stepping up enrichment, restricting inspections by monitors from UN nuclear agency