President Donald Trump said that Iran's nuclear program was "obliterated" last summer, but he now says the U.S. may have to bomb Iran again over Iran's nuclear ambitions.

Iran's negotiating delegation has left Tehran for a third ​round of nuclear talks with the U.S., ​state media reported on Wednesday, even as other Iranian officials slammed comments made by President Donald Trump during his state of the union address.

Iran accuses Trump of lying in his State of the Union about the country's nuclear ambitions, as the next round of bilateral talks looms.

Trump warns Iran in State of the Union: "I will never allow the world's number one sponsor of terror to have a nuclear weapon" while signaling diplomacy.

An Iranian official claimed the U.S. has engaged in a "disinformation and misinformation" campaign against Iran.

General Dan Caine has warned that strikes against Iran could be risky, potentially drawing the US into a prolonged conflict, US media report.

President Trump said Iran is working to build missiles that could "soon" strike America. U.S. intelligence reports have offered a more cautious view.

During his State of the Union address, Trump indicated he was considering attacking Iran if it refused to give up its nuclear program and effort to build long range missiles.

The next round of talks between the US and Iran in Geneva on Thursday could be decisive in the president's decision-making.

After ordering the largest American military buildup in the Middle East since the onset of the Iraq War, President Donald Trump now has a decision to make on Iran.