The 30,000 pound munition, equipped by the U.S. B-2 Spirit stealth bomber may be the only aerial bomb that can reach Iran's Fordow nuclear site.

Deep under a mountain, just a short distance from the Shiite holy city of Qom, an Iranian nuclear facility is in operation that experts believe is capable of enriching uranium to military levels. The Fordow Fuel Enrichment Plant is perhaps the most critical target in Israel’s weeklong bombing campaign against the Islamic Republic.

The United States’s B-2 stealth bomber is currently the only aircraft designed to deploy the GBU-57 bunker buster bombs.