5.1-Magnitude Earthquake Hits Iran

Semnan is home to the Semnan Missile Complex operated by Iran's military as well as the Semnan Space Centre.

Pictures of the aftermath showed what appears to be a giant crater on the top of the reactor within the facility.

The nuclear site had been "inactive" as it was yet to be completed, but the IDF said it had to be taken out because it was designed to cultivate plutonium for use in nuclear weapons.

At the heart of its nuclear program is the Fordow Fuel Enrichment Plant, which is encased in steel more than 300 feet beneath solid rock - and has so far escaped serious damage.

Israel’s arsenal lacks huge bunker buster bombs needed to destroy the underground enrichment facility - some 125 miles from capital Tehran.

Only America currently has the fearsome GBU-57 bombs capable of blitzing Fordow.

It's a Massive Ordnance Penetrator (MOP) bomb that can penetrate deep inside the ground before blowing up.

The 20-foot-long monster bomb can explode to obliterate enemy targets that are often hidden beneath mountains and massive layers of rocks.

Its 30,000lb weight means that its sheer kinetic force enables it to reach deeply buried targets - almost 200ft beneath the surface.

At the heart of Tehran's nuclear program is the Fordow Fuel Enrichment Plant, which is encased in steel more than 300 feet beneath solid rock - and has so far escaped serious damage.

Israel’s arsenal lacks huge bunker buster bombs needed to destroy the underground enrichment facility - some 125 miles from capital Tehran.

Only America currently has the fearsome GBU-57 bombs capable of blitzing Fordow.