They described North Korea as an "urgent national security threat and top foreign policy priority", supplanting the Islamic State.
The U.S. military started moving parts of an anti-missile defense system to a deployment site in South Korea on Wednesday, triggering protests from villagers and criticism from China.
North Korea's growing nuclear and missile threat is perhaps the most serious security challenge confronting U.S. President Donald Trump.
"What we are endeavoring to do is work with partners in the region and others to isolate the North Korean ballistic missile program and the nuclear program from any sort of external support", the official continued.
The meeting occurred as the US continued to deploy parts of a missile defense system to South Korea, known as the Terminal High Altitude Area Defense (THAAD).
The earlier-than-expected steps to deploy system were denounced both by China, and the frontrunner in South Korea's presidential election on May 9.
Wednesday's briefings will focus on three key issues related to North Korea's nuclear program: intelligence about the North's capabilities; USA response options, including military ones; and how to get China and other countries to enforce existing economic sanctions on Pyongyang, along with ideas for new penalties.
Meanwhile, US senators have arrived in Washington for an extraordinary briefing on the threat posed by North Korea. According to the Yonhap news agency, the parts include two or three launchers, intercept missiles and radar.
They said it did not appear he had made up his mind on whether to use force against North Korea.
Chernova loses Beijing bronze for doping The second Russian to be disqualified on Monday was 400m runner Maksim Dyldin, who failed to medal at the 2012 Games in London. On Monday, nearly nine years after the Beijing Games, she got a call to tell her that she had been upgraded to a bronze medal.
The Chinese envoy for North Korea says China and Japan have agreed to coordinate in seeking to denuclearize the Korean Peninsula and in urging North Korea to refrain from making further provocations.
"There's still time for THAAD to be actually up and running so we will fight until equipment is withdrawn from the site and ask South Korea's new government to reconsider", Kim told Reuters.
A mission press statement on Wednesday said North Korea will "surely win a victory in the death-defying struggle against the US imperialists".
A senior administration official said military preparations are underway in the chance that they become necessary regarding North Korea.
The White House said Secretary of State Rex Tillerson, Director of National Intelligence Dan Coats, Defense Secretary James Mattis and Gen. Joseph Dunford, the chairman of the Joint Chiefs of Staff, will lead Wednesday's briefing, set to occur in the Eisenhower Executive Office Building, adjacent to the West Wing.
However, the move has angered China, which said the advanced system would do little to deter the North, while destabilizing the regional security balance.
Admiral Harry Harris, the commander of U.S. Pacific Command (PACOM), also told the House Armed Services Committee that he is "encouraged" by China's recent efforts to influence North Korean behavior and he believes that North Korean leader Kim Jong Un "has noticed a change is afoot with regard to China".
The statement ends on a familiar note: "We remain prepared to defend ourselves and our allies", it reads.
Mr Trump's predecessor, Barack Obama, imposed sanctions on the North just over a year ago following a nuclear test and satellite launch by the North.
The as-yet-untitled Jurassic World sequel - the fifth instalment in the franchise - is due to be released in June 2018. Goldblum will be joining Chris Pratt and Bryce Dallas Howard in the now filming yet-to-be-officially-titled sequel.
Lawyers for the state said the inmates scheduled for execution filed an "avalanche" of lawsuits in hopes to stay their executions. Both men were served last meals on Monday afternoon, Arkansas Department of Correction spokesman Solomon Graves said.
She also starred in the same role in the spinoff titled " Joanie Loves Chachi " which aired from 1982 to 1983. Authorities say former "Happy Days" star Erin Moran likely died from cancer at her southern in home.
Brandon Phillips and Adonis Garcia gave the Braves the lead with back-to-back home runs, giving Atlanta a 4-2 advantage. Chapman got his third save on the season. "The thing was dancing around pretty good", Braves manager Brian Snitker said.
Gary Herbert also says he's invited Interior Secretary Ryan Zinke and President Trump to visit the Bears Ears monument . According to the paper the review will "discern whether [the monuments] are within the law's intent".
One quote from the documents that stands out: officers describe only using " minimal but necessary force to remove the subject". He then did an about face, offering Dao a public apology for the way he was treated. "Not a lick of it", Demetrio said.
When Jeter, who lives in Tampa, retired after the 2014 season, he expressed interest in owning a baseball franchise. A source told the Herald that Bush would be the "control person", and would have ultimate control of the franchise.
It was Blackmon's sixth homer of the season and followed a pinch-hit double from Pat Valaika - his first hit of the season. Orlando Arcia's 42-game errorless streak came to an end when the Brewers shortstop committed two errors on Monday night.
Mbete insisted earlier on Wednesday that the rules of the National Assembly did not give her the authority to withdraw the motion. The applicant (UDM) further asserts that the absence of a secret ballot undermines the goal of the no confidence motion.
Now that Heard and Musk are officially the couple of the summer, perhaps a cute couple nickname will be bestowed upon them. Heard, 31 and Musk 45, were first linked together in July amid The Danish Girl star's divorce from Johnny Depp.
Malcolm Butler trade rumors
The report noted that New Orleans likes this year's deep and loaded draft class too much to give up one of their picks. Butler can skip the offseason program, including next month's OTAs, but those are voluntary anyway.
Dale Earnhardt Jr. announces retirement
The weight of the NASCAR world was thrown onto the young driver in 2001 when his father was tragically killed in the Daytona 500. Hendrick Motorsports announced Tuesday morning that Dale Earnhardt Jr . will retire from NASCAR at the end of the 2017 season.
Drake to Host First Ever NBA Awards Show
The inaugural NBA Awards on TNT will take place on Monday, June 26, at Basketball City at New York City's Pier 36 at 9 p.m. Rapper Drake has been announced as the host of the first-ever NBA Awards on TNT .
Dodgers bring up top prospect Cody Bellinger
The Los Angeles Dodgers announced that one of the top power-hitting prospects in baseball will be making his way to the majors. In Triple-A and obviously up here, the ball moves and it's not going to be a straight heater all the time.
Trump tax plan will sharply slash corporate tax rates
That means Democrats would have to support it, and Republicans and Democrats have major differences when it comes to tax reform. A new congressional estimate could upend President Donald Trump's tax plan even before he releases it.
10, including six children, killed in Kurram Agency blast
The injured soldiers were later airlifted in a military helicopter and taken to the army-run hospital in Miranshah military camp. Earlier, on 31st March 2017, a deadliest explosion outside an Imam Bargah killed at least 24 and injured over 80.
Johnson scores 28, Jazz beat Clippers 105-98 to even series
The Clippers led by seven with seven minutes to go as Chris Paul took control. (Johnson) made tough shots on our best defender. Joe Ingles came up big for the Utah Jazz as they defeated the LA Clippers 105-98 and levelled the series at two games apiece.
Canada moves to legalise recreational pot
Adults would be able to have up to 30 grams of legal marijuana in public and be permitted to grow up to four plants per household. It has allowed criminals and organized crime to profit, while failing to keep cannabis out of the hands of Canadian youth.