Defence Secretary Pete Hegseth and Joint Chiefs Chairman Gen. Dan Caine speak during a news conference at the Pentagon in Washington on Sunday after the US military struck three sites in Iran, directly joining Israel's effort to destroy the country's nuclear program.Joint Chiefs of Staff chairman General Dan Caine on Sunday said that while the bombing of Iran’s nuclear sites successfully struck all three targets and did “extremely severe” damage, exactly to what extent Iran’s nuclear program has been set back cannot be known yet.“It would be way too early for me to comment on what may or may not still be there,” the career Air Force officer said at the joint news conference at the Pentagon with Defence Secretary Pete Hegseth.His assessment offered a stark contrast with the boasts of both President Donald Trump in r