The GBU-57 A/B, weighing roughly 30,000 pounds, is a precision-guided bomb capable of penetrating about 200 feet below the surface before exploding.

Maxar Technologies released satellite imagery on Sunday showing activity at Iran's Fordo nuclear facility prior to U.S. air strikes.

President Trump calls attack "very successful", as Washington joins Israel's air campaign against Iran. Tehran had warned the US that any involvement would lead to retaliation.