Director of National Intelligence Tulsi Gabbard said that “new intelligence” showed that Iran’s nuclear facilities had been “destroyed” during last weekend’s U.S. military strikes. Gabbard didn’t provide specifics about the intelligence she was citing or explain what she meant by destroyed,

A U.S. intelligence assessment has contradicted the White House's assertion about its Iran strikes, according to numerous reports.

Far more dangerous than U-235 are the elemental products given off when nuclear fuel goes through fission—especially iodine, strontium, and cesium. “These are the things that uranium splits into when it’s working in a reactor or a bomb,” says Smith. “Those fission products are much more densely radioactive than uranium.”