Multiple US B-2 bombers appear to have taken off from Whiteman Air Force Base in Missouri on Friday night and are heading west, according to flight tracking data CNN has reviewed, as President Donald Trump weighs his military options over a potential airstrike in Iran.

At the request of the Trump administration, the Israeli Air Force took out multiple Iranian air defense systems in the 48 hours leading up to the U.S. strike on Iran's Fordow nuclear facility, three U.

The bombing marks a dramatic escalation in the U.S. government's long-running effort to prevent Tehran from acquiring a nuclear weapon.