A test of Britain's nuclear deterrent system ended in failure for the second time. The incident involved a $70 million Trident missile that both the US and UK have in their arsenal.

The Royal Navy’s four Vanguard-class submarines are the cornerstone of the United Kingdom’s strategic nuclear deterrent.

A nuclear-capable Trident II missile test launched in the Atlantic off the coast of Florida on Jan. 30 reportedly splashed back down shortly after launching, according to Britain's The Sun newspaper.

A British nuclear missile test launch failed at a test site off the coast of Florida, marking the second time in eight years that the country’s Trident 2 ballistic missiles have malfunctioned ...

Lockheed Martin Corp.’s LMT business segment, Space Systems, recently clinched a modification contract for manufacturing its Trident II D5 missile. Per the terms of the deal, Lockheed will also ...

An unarmed Trident II D5 missile launches from the Ohio-class ballistic missile submarine USS Nebraska off the coast of California in 2021. (1st Class Ronald Gutridge/Navy) The U.S. Navy’s ...

Britain's Trident nuclear-deterrent system misfired during a test last month, sending a missile crashing into the ocean off the Florida coast near the submarine that launched it, The Sun newspaper ...

LONDON — British lawmakers are seeking reassurances about the nation’s nuclear deterrent after reports that a test of the system failed dramatically last month when an unarmed missile crashed ...

The test firing of a Trident missile from a Royal Navy submarine has failed, for the second time in a row. The latest test of the UK's nuclear deterrent was from HMS Vanguard and was seen by ...

The decision means that Britain’s air force will have a nuclear role for the first time since the end of the Cold War.

A British nuclear missile test launch failed at a test site off the coast of Florida, marking the second time in eight years that the country’s Trident 2 ballistic missiles have malfunctioned ...