US PRESIDENT Donald Trump boasted of his country’s nuclear superiority yesterday as Canada secured the release of a prisoner from North Korea.

On the anniversary of the  devastating US nuclear attack on Nagasaki, Mr Trump tweeted: “My first order as president was to renovate and modernise our nuclear arsenal. It is now far stronger and more powerful than ever before.

“Hopefully, we will never have to use this power, but there will never be a time that we are not the most powerful nation in the world.”