US strikes on Iran: what we know

President Donald Trump had spent weeks pursuing a diplomatic path to replace the nuclear deal with Tehran that he tore up during his first term in 2018.
But he ultimately decided to take military action against Iran's nuclear program, which had already been bombarded in a more than week-long Israeli campaign that has also targeted Tehran's top military brass.
Below, AFP examines what we know about the US strikes on Iran -- an operation dubbed "Midnight Hammer."
Major operation
Caine told journalists the strikes involved more than 125 US aircraft including B-2 Spirit stealth bombers, fighters, aerial refueling tankers, a guided missile submarine and intelligence, surveillance and reconnaissance aircraft.
"This mission demonstrates the unmatched reach, coordination and capability of the United States military," the general said. "No other military in the world could have done this."
Caine said it was "too early" to comment on what remains of Iran's nuclear program, but that "initial battle damage assessments indicate that all three sites sustained extremely severe damage and destruction."
B-2 bombers
The US employed seven B-2s in the strikes -- aircraft that can fly 6,000 nautical miles (9,600 kilometers) without refueling and which are designed to "penetrate an enemy's most sophisticated defenses and threaten its most valued, and heavily defended, targets," according to the US military.
"This was the largest B-2 operational strike in US history and the second-longest B-2 mission ever flown," according to Caine.
Several B-2s proceeded west over the Pacific as a decoy while the bombers that would take part in the strikes headed east -- a "deception effort known only to an extremely small number of planners and key leaders," the general said.
"Iran's fighters did not fly, and it appears that Iran's surface-to-air missile systems did not see us. Throughout the mission, we retained the element of surprise," Caine said.
The United States used the B-2 in operations against Serbian forces in the 1990s, flying non-stop from Missouri to Kosovo and back, and the bombers were subsequently employed in the Afghanistan and Iraq wars in the 2000s.
Massive Ordnance Penetrator
Caine said the B-2s dropped 14 bombs known as the GBU-57 or Massive Ordnance Penetrator -- a powerful 30,000-pound (13,600-kilogram) bunker-busting weapon that made its combat debut in the Iran operation.
The bombs -- which are designed to penetrate up to 200 feet (60 meters) underground before exploding -- were needed to hit deeply buried Iranian nuclear facilities.
Testing of the weapons began in 2004 and Boeing was in 2009 awarded a contract to complete the integration of GBU-57 with aircraft.
Tomahawk cruise missiles
In addition to the bombers, a US guided missile submarine in the Middle East launched more than two dozen missiles at unspecified "surface infrastructure targets" at Isfahan, one of three nuclear sites struck in the operation, Caine said.
The missiles are "designed to fly at extremely low altitudes at high subsonic speeds, and are piloted over an evasive route by several mission tailored guidance systems" and were first used in 1991 against Iraqi forces during Operation Desert Storm, according to the US military.
Aim of the strikes
US Defense Secretary Pete Hegseth told journalists the strikes were launched to "neutralize the threats to our national interests posed by the Iranian nuclear program and the collective self-defense of our troops and our allies."
"This mission was not, has not been, about regime change," Hegseth told journalists.
A number of key figures in Trump's "Make America Great Again" movement have vocally opposed US strikes on Iran, and his promise to extract the United States from its "forever wars" in the Middle East played a role in his 2016 and 2024 election wins.
What comes next?
Trump has called on Iran to "agree to end this war," saying that "now is the time for peace."
But it remains to be seen whether the strikes will push Tehran to deescalate the conflict, or to widen it further.
If Iran chooses the latter option, it could do so by targeting American military personnel who are stationed around the Middle East, or seek to close the strategic Strait of Hormuz, which carries one-fifth of global oil output.

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