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

U.N. nuclear inspectors on Friday departed from Iran two days after the Middle Eastern nation suspended cooperation with the program and weeks after the United States and Israel bombed nuclear sites.

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.