What are 'bunker buster' bombs, and how is the US using them against Iran?

Source: Business Insider

The US military's B-2 stealth bomber is the only aircraft capable of carrying and dropping 'bunker busters," the world's most powerful nonnuclear bomb. Here's what we know about the 30,000-pound weapons and why the US is using them to strike nuclear sites in Iran.Read the original article on Business Insider