State Department downplays significance of 25-year deal between nations that could lessen American influence, says has 'narrow tactical alignment' with China on nuclear issue

Amos Yadlin says China believes it can be more aggressive with Biden; full details of agreement not public, but draft reported last year calls for Beijing, Tehran to exchange intel

Beijing to invest $400 billion in Iran in exchange for oil, report says; agreement will strengthen military ties and may undermine US leverage in Middle East

Top Chinese diplomat Wang Yi arrives in Tehran to ink deal that will include investments in energy and infrastructure; final details not announced yet

NSA said to have intercepted Revolutionary Guard chatter on mounting 'USS Cole-style attacks' against Fort McNair, a reference to deadly 2000 suicide attack in Yemeni port of Aden

Diplomat to meet Iranian officials as part of UN Security Council role; foreign minister Zarif says Tehran will soon present a 'constructive' plan of action

In interview with Fox News, defense minister says it would be 'good' if world stops Tehran from obtaining atomic weapons before Israel forced to take action

Western diplomats tell Wall Street Journal Tehran's rejection of EU proposal doesn't kill chances for negotiations in near future, may be aimed at getting leverage

Analysts say Tehran looking to boost its leverage as Washington seeks to rein in its nuclear program

PM issues warning after Tehran begins restricting access to IAEA inspectors, in further breach of nuke deal; top Israeli officials hold policy meeting as US seeks to reenter accord