Joe Biden joked that he had a 'code to blow up the world' as he chatted about nuclear weapons on a visit to the world's largest windmill factory.
The president went on to mistakenly call his predecessor 'Congressman Trump' in a gaffe-strewn appearance.
As he approached three yellow-vested workers at the facility in Colorado one of them appeared to ask him an inaudible question.
Biden responded: 'Now look, my, my marine carries that. It has a code to blow up the world. That doesn't, this is not....nuclear weapons is it....alright, ok...you think I'm kidding.'
Biden told windmill workers he had a code to 'blow up the world'
A military aide carries the 'nuclear football'
Biden jokes about nuclear weapons at the factory
The codes for launching nuclear weapons - which are on a card known as the 'nuclear biscuit' - are carried in a black case called the 'nuclear football'.
A military aide carries the case and stays close to the president when he is traveling.
In a subsequent speech at CS Wind in Pueblo, Colorado, Biden attacked cuts he said 'Congressman Trump and Boebert want to do.'
That was a reference to Lauren Boebert, the Republican Colorado congresswoman whose district he visited on his trip.
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