The new bombing of Iran is not just headline news because the first attack on Iran in US history, but the weapon that was used was also used for the first time.
American B-2 bombers were used in the attack, and CNN sources say that the US also used a "bunker buster" bomb of almost 15 tons, which is the first known case of using this bomb. This bomb was probably needed to destroy the last intact nuclear facility in Iran, and only the US possesses it.
Such a powerful weapon, the largest non-nuclear bomb in the US arsenal, was needed because the target, the Fordow nuclear fuel enrichment facility, was built about 90 meters inside a mountain near the town of Qom, two hours south of Tehran.
They penetrate the ground.
The heavy explosive bomb is known as the GBU-57A/B Massive Ordnance Penetrator and was designed by Boeing for the United States Air Force. Its enormous weight means it can only be delivered with the B-2 stealth bomber, an aircraft that the Israeli Air Force does not possess, the Guardian writes.
"The United States controls the bomber and the bomb," John Spencer, chair of urban warfare studies at the Modern Warfare Institute at West Point Military Academy, told the Post recently.
The missile cost the U.S. military over $500 million to develop, and was built to specifications that would allow it to penetrate deep enough into the Fordow facility to destroy the complex's nuclear centrifuges, according to a 2013 Wall Street Journal report, which said at the time that 20 bombs had been produced for the U.S. military.
That's why these bunker busters are called penetrators, because they penetrate the ground before exploding. In this way, the explosion was strategically delayed.
Although the US has sold less powerful bunker buster bombs to Israel, it has refused to share the Massive Ordnance Penetrator with any of its allies.