Russia said the use of a tactical nuclear weapon by the U.S. in Iran would be "catastrophic" after a report that it had not been ruled out as an option for President Donald Trump, who is considering joining Israel's strikes.

As Trump considers joining the war in the Middle East, Iran’s ally says there could be potentially perilous consequences for the world.

Israel's escalating conflict with Iran over its increased nuclear as brought up speculation about the possible use of one of America's powerful weapons in the conflict.

As President Donald Trump is warming to the idea of using US military assets to strike Iranian nuclear facilities, officials and experts have suggested the US’ 30,000-pound “bunker buster” bomb is the only weapon capable of destroying the Fordow Fuel Enrichment plant,