THE diversion of an armada of American warships from port visits in Australia to the waters off North Korea gives US President Donald Trump a “full range of options” against dictator Kim Jong-un’s regime.

Mr Trump’s national security adviser, General HR McMaster, and US Secretary of State Rex Tillerson, signalled on Sunday the US was preparing to respond to North Korea’s aggressive ramp up of its nuclear and ballistic missile programs.

The US Navy’s Third Fleet forward-deployed strike group, headed by the supercarrier USS Carl Vinson and supported by guided-missile destroyers and cruisers, was scheduled to visit Australia but it was announced on Saturday they had received orders to re-route toward the Korean Peninsula.

“The president has asked to be prepared to give him a full range of options to remove that threat to the American people and to our allies and partners in the region,” General McMaster, in an interview on FOX News Sunday, said.

The move will raise tensions in the region and comes hard on the heels of a US missile strike on Syria that was widely interpreted as putting Pyongyang on warning over its refusal to abandon its nuclear ambitions.

General McMaster said North Korea was “a rogue regime that is now a nuclear capable regime” and at the Florida talks “President Xi and President Trump agreed that that is unacceptable, that what must happen is the denuclearisation of the Korean Peninsula”.

“Well, it’s prudent to do it, isn’t it?” General McMaster, when asked about the Third Fleet’s ominous presence, responded.

“I mean, North Korea has been engaged in a pattern of provocative behaviour.”

North Korea denounced Thursday’s strike as an act of “intolerable aggression” and one that justified “a million times over” the North’s push toward a credible nuclear deterrent.

“US Pacific Command ordered the Carl Vinson Strike Group north as a prudent measure to maintain readiness and presence in the Western Pacific,” said Commander Dave Benham, spokesman at US Pacific Command.

“The number one threat in the region continues to be North Korea, due to its reckless, irresponsible and destabilising program of missile tests and pursuit of a nuclear weapons capability,” he told AFP, in an unusually forceful statement.

Originally scheduled to make port calls in Australia, the strike group — which includes the Nimitz-class aircraft supercarrier USS Carl Vinson is now headed from Singapore to the Western Pacific Ocean.

Pyongyang is on a quest to develop a long-range missile capable of hitting the US mainland with a nuclear warhead, and has so far staged five nuclear tests, two of them last year.

Expert satellite imagery analysis suggests it could well be preparing for a sixth, with US intelligence officials warning that Pyongyang could be less than two years away from developing a nuclear warhead that could reach the US.

North Korea on Wednesday fired a medium-range ballistic missile into the Sea of Japan ahead of a US-China summit.

In February the North simultaneously fired four ballistic missiles off its east coast, three of which fell provocatively close to Japan, in what it said was a drill for an attack on US bases in the neighbouring Asian country.

Last August Pyongyang also successfully test-fired a submarine-launched ballistic missile 500km towards Japan, far exceeding any previous sub-launched tests, in what the North’s leader Kim Jong-un hailed as the “greatest success.”

A nuclear-capable SLBM system would take the North’s threat to a new level, allowing deployment far beyond the Korean peninsula and a “second-strike” capability in the event of an attack on its army bases.

SYRIA STRIKE A ‘GAME CHANGER’

Foreign Affairs Minister Julie Bishop says the US’s response to a “horrific” chemical attack in Syria has the potential to be a “game changer” in the six-year long conflict.

Ms Bishop said the US air strike in Syria and subsequent move to send a US navy strike group to the Korean peninsula amid concerns about its missile program showed President Donald Trump’s approach to foreign policy.

“I believe that President Trump ... through his commitment to an increased military budget, to increasing the US military, has committed to a foreign policy that includes the US taking action where the UN Security Council and where other nations are unable to act,” Ms Bishop told ABC this morning.

“I think it’s quite indicative of his foreign policy that, for example, the US is now sending a number of ships to North Korea to again send a message to North Korea that it cannot continue to launch ballistic missiles in provocative acts against Japan, South Korea, the region and the world more generally.

“I think the Trump foreign policy is that those nations that are violating international law should recognise they can’t do it with impunity.”

Earlier, Ms Bishop downplayed concerns that tensions between the US and Russia, and the US and North Korea, could escalate into war.

“I hope diplomacy will overcome all of the issues we are faced with at the present,” she told Channel Seven’s Sunrise program.

“We are at a very significant and difficult and challenging time but I am hoping that the world’s diplomats will be able to find a place where we can negotiate peace in many corners of the world.”

REMOVING AL-ASSAD A TOP US PRIORITY

Meantime, the removal of Syrian President Bashar al-Assad is a priority for Donald Trump, says the US Ambassador to the UN.

Nikki Haley said the removal of al-Assad, removing Iranian influence in Syria and defeating the Islamic State terrorist group are the priorities for the US President.

“We don’t see a peaceful Syria with Assad in there,” Haley told CNN.

The comments represented a departure from what Haley said before the US hit a Syrian air base with 59 Tomahawk missiles on Thursday in retaliation for a chemical weapons attack by al-Assad’s forces on Syrian civilians.

Australia’s Prime Minsiter Malcolm Turnbull today also doubted if al-Assad can play any part of a peaceful solution to the six-year civil war.

“I have grave doubts as to whether he can have any continuing role in the settlement. The crimes he has committed against his own people are so enormous,” Mr Turnbull said from Port Moresby, Papua New Guinea.

“His actions, his horrendous, criminal actions, gassing women and children, babies, that surely disqualifies him from a continuing role.”

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President Trump ordered the missile strike after watching television images of infants suffering from chemical weapons injuries.

“You pick and choose your battles and when we’re looking at this, it’s about changing up priorities and our priority is no longer to sit there and focus on getting Assad out,” Haley told reporters on March 30, just days before more than 85 Syrian civilians died from chemical weapons injuries.

New air strikes have targeted the town in Syria devastated by the chemical attack, with Russian planes believed to be responsible.

It wasn’t immediately clear who conducted the strikes on Khan Sheikhoun, which was hit on Friday and Saturday, though only Russian and Syrian regimen aircraft have been bombing that rebel-held area.

At least four civilians were killed.

Defence Minister Marise Payne said on Sunday that the US was keeping Australia informed of developments and had not asked for additional resources, as she again urged Russia to work with the Assad regimen to find a solution to the endless conflict.

“I will be meeting with senior members of the coalition again in the coming weeks and we will expect to discuss these activities further,’ she told ABC TV.

Senator Payne said Australia was already contributing significantly in advising and assisting personnel in Iraq.

“I know that is acknowledged by Iraq particularly, by the United States and other members of the coalition.”

The US is vowing to keep up the pressure on Syria after the intense night-time wave of missile strikes from US ships, despite the prospect of escalating Russian ill will that could further inflame one of the world’s most vexing conflicts.

Mr Tillerson is due to meet Russian Foreign Minister Sergei Lavrov in Moscow on Wednesday.

Standing firm, the Trump administration has signalled new sanctions would soon follow the missile attack, and the Pentagon was even probing whether Russia itself was involved in the chemical weapons assault that compelled President Trump to action. The attack against a Syrian air base was the first US assault against the government of al-Assad.

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And Russia’s Prime Minister Dmitry Medvedev claimed Mr Trump had been “one step away from military clashes with Russia”.

Mr Trump’s show of strength came during one of the most important meetings of his young presidency, as he hosted Chinese President Xi Jinping and his wife at the Florida golf resort dubbed the “winter White House”.

The first high stakes summit between the two superpowers was to discuss trade, security in the South China Sea and how to counter the nuclear threat of an increasingly aggressive North Korea.

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Mr Trump said in a brief appearance before reporters that he and Mr Xi made “tremendous progress” in their first face-to-face talks and that he believe “lots of very potentially bad problems will be going away”.

The missile strike was one of several options considered by Mr Trump and his senior security advisers, who also canvassed targeting the palace of dictator Bashar al-Assad, according to Reuters.

White House press secretary Sean Spicer said yesterday the air strikes were the result of a “72-hour evolution”, which marked a reversal of Mr Trump’s previous position, stated as recently as this week, that the US would not interfere in Syria.

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Syrian media said the strikes on the air base in Homs province — just after 3.30am Friday local time — killed at least seven soldiers.

US officials said at least 20 jets were destroyed, as well as infrastructure.

Within hours, Russia reportedly sent its most advanced Black Sea frigate into the Eastern Mediterranean, towards the destroyers USS Ross and USS Porter.

The Admiral Grigorovich RFS-494 crossed through the Bosphorus Strait from the Black Sea, according to an unnamed US defence official who spoke to Fox News.

Russian news agency TASS said the ship had recently taken part in a joint exercise with Turkish ships and was bound for the Syrian port of Tartus on a routine voyage.