President Donald Trump in about eight hours went from suggesting a nuclear deal remained “achievable” to urging Tehran’s 9.5 million residents to flee for their lives.

Blasts have been heard in Tehran and sirens have sounded in Israel as US president convenes National Security Council.

"American Forces are maintaining their defensive posture & that has not changed," the chief Pentagon spokesperson said.

Iranian officials have warned that U.S. participation in an attack on its facilities will imperil any chance of the nuclear disarmament deal the president insists he is still interested in pursuing.

Monday on the RealClearPolitics radio show -- weeknights at 6:00 p.m. on SiriusXM's POTUS Channel 124 and then on Apple, Spotify, and here on our website -- Andrew Walworth, Tom Bevan, and Carl Cannon break down the complex three-way relationship between the U.

After canceling negotiations with the U.S. scheduled for Sunday, Tehran has signaled it is willing to talk.

As the attacks escalate, with fatalities and injuries reported on both sides, Israel issued the stark warning to Iran.