The administration's immediate emphasis, the officials said, will be on increasing pressure on Pyongyang with the help of Beijing.
In a broadcast interview that aired on Sunday, McMaster said the US would rely on its allies as well as on Chinese leadership to resolve the issues with North Korea. North Korea, for nearly four decades a colony of imperial Japan, has seemingly absorbed the kamikaze-like death wish of those pilots who once made a last-ditch suicidal stand to die for the emperor.
Earlier in the day United States officials told NBC News that Washington is ready to use conventional weapons against North Korea in the event of Pyongyang's conducting a new nuclear test. "If not, we will solve the problem without them", he wrote.
The vice president spoke at a dinner after attending Easter church services with service members at the garrison. "The type of missile is still being assessed".
Will China use its considerable means to stop the North Korea nuclear program - as once the US did with its allies in South Korea and Taiwan - or will it continue to insist that North Korea is somebody else's problem?
It's unclear why it failed.
Trump's decision to order a cruise missile strike on a Syrian airfield this month, in response to what he said was Syria's use of chemical weapons, raised questions about his plans for reclusive North Korea. Trump also tweeted that if China doesn't do its part to rein in Pyongyang's nuclear ambitions, the USA can handle it.
According to the White House adviser, the test had been expected and the us had good intelligence both before and after the launch.
Pence's visit to Seoul is part of his 10-day trip to the Asia-Pacific region created to lay out the administration's policies for the region, including whether the U.S. would seek a "military option" against the belligerent North. Although Indonesia is not on the list of predominately Muslim countries included in Trump's travel ban, Indonesian leaders have expressed displeasure with the ban, which has been blocked by US courts.
"It suggests a commitment to this programme", said Pollack.
While a nuclear test can not be ruled out, he said, Pyongyang's failed missile test yesterday was proof that it needs more time to fine-tune its nuclear technology.
U.S. Vice President Mike Pence has arrived in South Korea at the start of a 10-day trip to Asia that comes amid turmoil along the Korean Peninsula over North Korea's threats to advance its growing nuclear and defense capabilities.
Some kind of launch by North Korea was highly anticipated as it celebrated the 105th anniversary of the birth of its founder on Saturday.
It was responding to speculation that South Korea and the US may adjust the pace of bringing a Terminal High Altitude Area Defense (THAAD) battery to the peninsula for political reasons, with South Koreans set to pick their new president on May 9.
Pence is the son of a Korean War veteran and displays his late father's Bronze Star in his office.
Pence, a former Republican congressman, so far has been more involved in helping Trump navigate domestic policy issues, said Peter Feaver, a top National Security Council aide in the George W. Bush White House.
Indeed, the BBC reported from Pyongyang that during the traditional parade in the city, there were what appeared to be Pukkuksong submarine-launched ballistic missiles, which have a range of more than 600 miles, and which were displayed for the first time.
This spotlight on Pyongyang means that this is a good time to take another look at some Bulletin stories that delve into what has been happening lately in the so-called "Hermit Kingdom".
It was not clear what his current role with North Korea's government was.
Han said USA sanctions efforts are misguided and cited the opening ceremony of a sprawling new high-rise residential area in Pyongyang on Thursday as evidence that sanctions have failed to ruin the country's economy.
The parade is inspected by the leader of the North Korea Kim Jong-un who is also the supreme commander in chief.
North Korea has conducted a raft of missile and nuclear tests in defiance of United Nations and unilateral sanctions, and there is anxiety it might stage a sixth nuclear test on Saturday to coincide with the "Day of the Sun'", the 105th anniversary of the birth of state founder Dear Leader Kim Il-sung.
Washington and Seoul will try hard to figure out what exactly North Korea fired.
Foreign Minister Wang Yi said "storm clouds" were gathering, an apparent reference to North Korean preparations to conduct a new nuclear test and the United States' deployment of a naval strike force to the waters off the peninsula.
"The bottom line is that North Korea has an improving nuclear weapons arsenal", said David Albright, the institute's president.
The annual U.S. -South Korea military exercises have consistently infuriated the North, which views them as rehearsals for an invasion.