By Dean Murray

The United States has unveiled its second more than $ 770 million stealth nuclear bomber .

The new B-21 Raider was seen arriving at Edwards Air Force Base in California on Thursday (September 11), as America moves forward with plans to produce 100 of the deadly aircraft.

The warplane has an estimated range of 12,000 km, enabling it to execute nuclear weapon strikes anywhere in the world.

The US Air Force (USAF) said: “The addition of the second test aircraft expands mission systems and weapons integration testing, advancing the programme towards operational readiness.”

Both pre-production B-21s, built by Northrop Grumman , are assigned to the 420th Flight Test Squadron.

They will undergo mission system and weapon integration tests, with the aim of reaching oper

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