Costing USD 3 billion, the Boeing B-29 Superfortress is history's most notorious aircraft. Featuring pressurised cabins and remote-controlled guns, it executed the deadliest conventional air raid in Tokyo and the only nuclear strikes in warfare.

‘Pressurised and lethal’: How the B-29 bomber unleashed unprecedented destruction in 1945

Will the US use nuclear weapons against Iran? That’s the question hanging over the war, and President Donald Trump has now given his clearest answer yet.

What did he say? Scroll down to find out.

US to use nuclear weapons against Tehran? Trump FINALLY REVEALS his plan on day 55 of Iran war

The US has successfully conducted a flight test of the modernised B61-12 nuclear gravity bomb using an F-35A, marking a major milestone in its nuclear deterrence program.

US confirms first successful B61-12 nuclear gravity bomb flight test from F-35

Trump made the remarks during his address to senior military leaders gathered at the event at the Marine Corps Base Quantico in Northern Virginia.

‘Two N-words you can’t use’: Trump lectures not to ‘throw around’ nuclear word but warns Russia of US submarines

Although these weapons sit on foreign soil, they remain under the control and custody of the United States at all times. The bombs are fitted with safety and security devices that prevent unauthorised use.

How many NATO allies host America’s nuclear weapons today?

It's the biggest hack of the US government in years. The US nuclear weapons agency, alongside several key departments of the US government, have been breached.

Gravitas: US Nuclear Weapons Agency Hacked

The US released its Nuclear Posture Review Friday

With an eye on Russia, US to increase nuclear capabilities

Twitter has announced it would not block the accounts of world leaders even if their statements are 'controversial,' citing a need to promote a 'public conversation' on political issues

Twitter won't block world leaders, citing need for discourse