Iran has many scientists with nuclear expertise and has stored its most critical facilities in bunkers that may be beyond the reach of Israel's bombs.

Israel struck key Iranian nuclear sites to curb bomb development amid rapid uranium enrichment and rising tensions.

Israel badly damaged one of Iran’s key nuclear sites and killed a startling array of top military and nuclear officials in the attacks that started on Friday morning. But when the sun rose after that devastating assault, it was also clear how much of Iran’s nuclear program remained, at least for now.