CBS News correspondent Adriana Diaz reports the missile, described by USA officials as a KN-17 medium range missile, reached an altitude of more than 1,300 miles - fired, North Korea said, intentionally at a high angle out of consideration for its neighbors. If confirmed, that would make it the highest test out of the seven Pyongyang has conducted this year. The Pacific island of Guam is a key hub for the USA military in the Pacific.
On Monday, South Korea's military played down the North's claim of technical progress on atmospheric re-entry, saying the possibility was low. And the United States rotates heavy bombers, including B-1s, B-2s and B-52s, through the island.
ICBM's are considered to have a range of about 6,000km, but analysts believe the missile tested on Sunday would have travelled about 4,000km if it had been fired at a standard trajectory rather than upwards. "North Korea has been a flagrant menace for far too long". Tests with both the KN-15 and KN-17 missiles provide experience and data for ongoing development of an intercontinental ballistic missile (ICBM) that could reach Australia or the United States.
But Melissa Hanham, senior research associate at the James Martin Center for Nonproliferation Studies in California, said the test could just as easily be a stepping stone to a longer-range weapon.
President Donald Trump will speak again to the newly elected South Korean president-who during his campaign advocated more direct engagement with North Korean leader Kim Jong Un.
Ji Jae Ryong told reporters Monday at the North Korean Embassy in Beijing that Pyongyang would continue to conduct launches in the future, as long as the country's supreme leader deemed necessary. In all, six sanction resolutions have been imposed on North Korea, since it carried out its first nuclear test in 2006.
Experts have cast doubt on that claim, though they say the test still represented a significant step forward for Pyongyang's goal of developing an intercontinental ballistic missile capable of hitting the USA mainland.
As part of its effort to ramp up the defence against North Koreans, the United States has deployed THAAD - Theater High-Altitude Air Defence System - which has the ability to defeat North Korean missiles.
This is largely consistent with South Korean and Japanese assessments that it flew further and higher than an intermediate-range missile (IRBM) tested in February.
But he slammed the latest missile test as a "reckless provocation" and said dialogue would be possible "only if the North changes its attitude".
The Russian defense ministry said the missile landed several hundred kilometers away from the city of Vladivostok in Russia's Far East, but Putin said the missile "didn't present a threat" to his country.
"With the missile impacting so close to Russian soil, in fact, closer to Russia than to Japan", Press Secretary Sean Spicer's statement read, "The President can not imagine that Russia is pleased".
The White House condemned the attack and made an unusually speculative statement, saying that "the President can not imagine that Russian Federation is pleased".
But it said Pyongyang's missiles did appear to be able to leave and re-enter the atmosphere, which is crucial to developing intercontinental ballistic missiles (ICBMs), South Korea's Yonhap news agency reports. But he warned against "intimidating" Pyongyang.
It is hard to say when the North will have a reliably tested ICBM ready to deploy, said Lee Choon-geun, a senior research fellow at South Korea's state-run Science and Technology Policy Institute.