Trump says damage to Iran's nuclear sites is 'far below ground level'

The State Department has issued a new worldwide caution alert prompted by the conflict between Israel and Iran, saying there is "potential for demonstrations against U.S. citizens and interests abroad."

“The conflict between Israel and Iran has resulted in disruptions to travel and periodic closure of airspace across the Middle East.  There is the potential for demonstrations against U.S. citizens and interests abroad. The Department of State advises U.S. citizens worldwide to exercise increased caution,” the alert reads.

Earlier this month, the State Department issued a regional alert related to the conflict, advising Americans in North Africa and the Middle East to exercise increased caution.

In October 2023, the U.S. issued a similar worldwide caution alert stemming from the Oct. 7 attacks on Israel and ensuing military campaign in Gaza.

-ABC News' Shannon Kingston

Iran's ambassador to the United Nations, Amir Saeid Iravani, condemned the United States' attacks on Iran during a meeting with the UN Security Council.

Iravani said the strikes on Iran's nuclear sites used the Non-Proliferation Treaty (NPT) as a "political weapon," calling it "aggression and unlawful action."

The ambassador warned that Iran's response would be determined by its armed forces. Iravani also denounced the assassination of Iran's General Qasem Soleimani.

"The timing, nature and the scale of Iran's proportionate response will be decided by its armed forces," Iravani said, adding, "All U.S. allegations against Iran are unfounded, with no legal basis and politically motivated."

-ABC News' Will Gretsky

President Donald Trump said in a new post to Truth Social on Sunday that the pilots of the B-2 bombers that participated in strikes on Iranian nuclear facilities have returned to U.S. soil.

"The GREAT B-2 pilots have just landed, safely, in Missouri. Thank you for a job well done!!!," Trump wrote.

More than 125 aircraft participated in the mission, including seven B-2 Spirit stealth bombers, which were launched from the continental U.S. and refueled multiple times in midair as they flew 18 hours to reach their targets, according to Gen. Dan Caine, chairman of the Joint Chiefs of Staff.

Other aircraft that participated in the mission included B-2 bombers used as decoys, as well as refueling tankers, fighter escorts, and drones that provided Intelligence, surveillance and target acquisition, according to U.S. officials.

-ABC News' Michelle Stoddart

The leaders of France, the United Kingdom and Germany released a joint statement on Sunday following the United States' strikes on Iran.

"We reiterate our commitment to peace and stability for all countries in the region," the statement posted to French President Emmanuel Macron's official website said.

"We affirm our support for Israel's security," the leaders continued, saying, "We have always been clear that Iran can never have a nuclear weapon and can never again pose a threat to regional security."

Macron, along withthe UK's Prime Minister Keir Starmer and German Chancellor Friedrich Merz called on Iran to "engage in negotiations leading to an agreement that addresses all concerns related to its nuclear program."

"We urge Iran to refrain from further actions that could destabilize the region," the leaders added.