U.S. nuclear arsenal far more powerful than ever before:Trump

After issuing an ultimatum to North Korea for threatening the United States, President Donald Trump, in a series of tweets,said that the US nuclear arsenal is now "far stronger and more powerful than ever before."

President Trump on Wednesday touted the strength of the country's nuclear arsenal.

Trump expressed hope the U.S. would not have to use this "power," but remained confident in the strength of the country.

Trump tweeted,"My first order as President was to renovate and modernize our nuclear arsenal. It is now far stronger and more powerful than ever before...."

Trump further tweeted,"...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!"

Trump said Pyongyang will "face fire and fury like the world has never seen," during a photo op at the Trump National Golf Club in Bedminster, New Jersey.

"North Korea best not make any more threats to the United States. They will be met with fire and fury like the world has never seen... he has been very threatening beyond a normal state. They will be met with fire, fury and frankly power the likes of which this world has never seen before," he said.

Secretary of State Rex Tillerson on Wednesday, however, said he doesn't believe there is "any imminent threat" from North Korea and urged Americans to remain calm.

"What the president is doing is sending a strong message to North Korea in language that Kim Jong Un can understand, because he doesn't seem to understand diplomatic language," Tillerson said.

"I think the president just wanted to be clear to the North Korean regime on the U.S. unquestionable ability to defend itself, will defend itself and its allies.