The move, the first time the U.S. has attacked Iran, is a major escalation of the conflict between Israel and Iran.

President Donald Trump announced Saturday evening that the United States military carried out airstrikes on three Iranian nuclear sites, joining Israel’s bombing campaign in an effort to cripple Tehran’s ability to build a nuclear weapon.

The United States struck three nuclear sites in Iran on Saturday, plunging the U.S. into a pitched battle that has been waged over the past several days between Israel and Iran. The full ramifications of the U.