The ultimate success of the U.S. and Israeli strikes, and so Trump's decision to intervene militarily, depends on how Iran chooses to react. Some analysts fear this action will accelerate Iranian efforts to build a nuclear weapon, with hardliners in Tehran now viewing it as an urgent priority.

The U.S. bombing of Iran's key Fordow nuclear site has "seriously and heavily damaged" the facility, Iranian Foreign Minister Abbas Araqchi said in an interview with CBS News. "No one exactly knows what has transpired in Fordow.

Iran is assessing the damage and lashing out over the American and Israeli airstrikes that damaged its nuclear sites.

Pentagon reports Iran's nuclear facilities were "completely obliterated" in June strikes, offering a more optimistic assessment than earlier estimates while Iran acknowledges damage.

The Pentagon on Wednesday sharpened its assessment of Iran's nuclear program, declaring that Iran's ability to build a nuclear weapon following the U.S. strike on its nuclear facilities is "closer to two years" away.