Tehran says it will not observe curbs on uranium enrichment, stockpiles, research and development, but cooperation with UN watchdog will continue

Tehran spokesman doesn't specify what measure will be, as Tehran continues to retreat from 2015 accord despite pleas from remaining parties

Airstrike on Quds Force commander, a 'truly irreplaceable' figure who directed Iranian proxies throughout Mideast, strikes a serious blow to Tehran's expansionism, experts say

Unpopular overseas, the US president must deal with numerous global trouble spot as he struggles with a likely impeachment trial in the Senate and conducts a reelection campaign

Operating secondary heat transfer circuit doesn't violate 2015 nuclear deal, but it is a step closer to producing weapons-grade material

Milestone brings site closer to reopening and producing heavy water, a key ingredient in the production of plutonium, which fuels nuclear weapons

President Hassan Rouhani confirms Tehran running more advanced models to step up enrichment, in violation of 2015 pact

Hawks win concession from White House after Republican lawmakers threaten to scuttle nomination of State Department official

Assistant head of country's Atomic Energy Organization says '50 new achievements' will be revealed next year

As Tehran resumes nuclear development, nations have threatened to bring case before UN Security Council and potentially initiate 'snapback' of sanctions