Although Iran maintains that its nuclear program is for peaceful energy purposes, Israel has long seen it as a threat. Israeli strikes have hit three of Iran’s nuclear facilities — Natanz, Isfahan and Fordow. Little damage appears visible in satellite imagery of Fordow.

Israeli fighter jets have been seen armed with inexpensive glide bombs. Air superiority means it doesn't need to expend costly stand-off missiles.

Iran warns of an "unprecedented" retaliation if Israel attacks, while President Trump describes the Middle East as a "dangerous place."