US, Israel launch strikes on Iran. What we know so far

Here's what we know so far about the US and Israel's strikes on Iran, which led to counterattacks and fears of a wider regional war.

President Donald Trump said the United States and Israel launched "major combat operations" against Iran on Feb. 28 after the largest build-up of American power in the Middle East since the 2003 U.S.-led invasion of Iraq. Trump also called for Iranians to overthrow their government.

Explosions were observed in Tehran and at least five cities across the country, and Iran's military started retaliating against Israel, according to the Israel Defense Forces. There were also explosions and siren-alerts reported in several Middle East nations where the U.S. has military bases.

Here's what we know about this developing story.

The Pentagon has named the operation against Iran "Epic Fury." Israel's military codenamed it "Roaring Lion." Israel initially launched the operation and then was joined by the U.S. The explosions in Tehran were reported early in the morning Eastern Time on Feb. 28, which is mid-morning in Iran.

Within hours, Iran started sending missiles toward Israel and there were reports of attempted strikes against U.S. military facilities in Bahrain, the United Arab Emirates and Qatar. Some nations said missiles were intercepted.