Hundreds of civilians, mostly in Iran, have been killed by dueling airstrikes despite international pleas for de-escalation.

The president had opposed Israeli action against Iran but came to believe that Israel had reason to act and that the U.S. would have to lend some support.

President Trump rejected an Israeli plan in recent days to kill Iran's Supreme Leader Ayatollah Ali Khamenei, a senior U.S. official told USA TODAY.

The U.S. president faces pushback over the risk of U.S. involvement in the escalating conflict between Israel and Iran.

Shapiro served as Deputy Assistant Secretary of Defense for the Middle East until January—charged with, among other things, considering scenarios in which tensions between Israel and Iran escalated into all-out war and preparing U.

President Donald Trump warned that "it's possible" that the United States "could get involved" in the ongoing Israel-Iran conflict if it continues to escalate during an exclusive interview with ABC News' Rachel Scott on Sunday (June 15).

Iran has vowed to retaliate against the U.S., too, while Trump has warned: “If we are attacked in any way, shape, or form by Iran, the full strength and might of the U.S. Armed Forces will come down on you at levels never seen before.” Here’s what to know about U.S. involvement so far.

BEIRUT — Iran and Israel traded air raids and ballistic missile barrages overnight and into the evening Sunday, with neither side showing any inclination to back down from an escalating grudge match between the two longtime enemies.

The conflict, the most intense fighting between the two countries in decades, has been met in the United States with feelings of “frustration and helplessness,” as well as heartbreak.

In a series of posts on X over the weekend, Ackman laid out a detailed case for why the US should join Israel’s ongoing operations against Iran.

Israel has said it launched Operation Rising Lion to deal a blow to Iran’s nuclear ambitions. Prime Minister Benjamin Netanyahu has claimed that the strikes are essential to ‘roll back the Iranian threat to Israel’s very survival’ and that Tehran could build a nuclear weapon within a few months.