Rex Tillerson Guam stop newday_00004702.jpg
PHOTO: CNN
Rex Tillerson Guam stop newday_00004702.jpg
Now playing
00:47
Tillerson on N. Korea: Americans can sleep well
Now playing
07:38
Keilar points out Fox News host's hypocrisy
Now playing
01:23
'There should be no threats': Biden's message to union-busters
Ashley Vanderbilt Former QAnon believer
PHOTO: CNN
Ashley Vanderbilt Former QAnon believer
Now playing
07:40
Former QAnon believer shares bonkers conspiracy theory about Biden
snl.fauci.vaccine.orig_00005420.png
snl.fauci.vaccine.orig_00005420.png
Now playing
01:24
'SNL' has 'Dr. Fauci' helping people get vaccinated
The Pokémon Company announced new games during its 25th Anniversary Celebration
PHOTO: The Pokémon Company
The Pokémon Company announced new games during its 25th Anniversary Celebration
Now playing
01:01
See the new Pokémon games coming soon
PHOTO: nickelodeon/from youtube
Now playing
01:33
'Real World,' 'Frasier,' 'Spongebob:' See the reboots coming to this new streaming service
Now playing
02:28
Fisker is making its next electric vehicle with Foxconn
Airbnb CEO Brian Chesky speaks onstage during "Introducing Trips" Reveal at Airbnb Open LA on November 17, 2016 in Los Angeles, California.  (Photo by Mike Windle/Getty Images for Airbnb)
PHOTO: Mike Windle/Getty Images for Airbnb
Airbnb CEO Brian Chesky speaks onstage during "Introducing Trips" Reveal at Airbnb Open LA on November 17, 2016 in Los Angeles, California. (Photo by Mike Windle/Getty Images for Airbnb)
Now playing
03:51
Airbnb CEO: This is how we outperformed our competitors in 2020
PHOTO: ABC's "Jimmy Kimmel Live!"
Now playing
01:46
Watch people struggle to identify second gentleman Doug Emhoff
PHOTO: "The Late Late Show with James Corden" / Youtube
Now playing
01:37
See Prince Harry and James Corden tour LA on open-air bus
(CNN) —  

US Secretary of State Rex Tillerson has sought to allay fears of a military confrontation with North Korea after President Donald Trump warned he could unleash “fire and fury” on the pariah state.

Tillerson defended Trump’s comments but said there was no sign that the threat level from North Korea had changed and that Americans should “sleep well at night.”

01:27 - Source: CNN
North, South Korean leaders to meet again
PHOTO: Nicolas Asfouri/Pool/Getty Images/AFP PHOTO/KCNA VIA KNS
Now playing
01:27
North, South Korean leaders to meet again
PHOTO: Airbus Defense and Space
Now playing
01:44
New images show N. Korea dismantling test site
PHOTO: CNNI
Now playing
00:40
Pompeo dismisses N. Korea's 'gangster' comments
SINGAPORE - JUNE 12: In this handout photo, North Korean leader Kim Jong-un shakes hands with U.S. President Donald Trump during their historic U.S.-DPRK summit at the Capella Hotel on Sentosa island on June 12, 2018 in Singapore. U.S. President Trump and North Korean leader Kim Jong-un held the historic meeting between leaders of both countries on Tuesday morning in Singapore, carrying hopes to end decades of hostility and the threat of North Korea's nuclear program. (Photo by Kevin Lim/THE STRAITS TIMES/Handout/Getty Images)
PHOTO: Handout/Getty Images AsiaPac/Getty Images
SINGAPORE - JUNE 12: In this handout photo, North Korean leader Kim Jong-un shakes hands with U.S. President Donald Trump during their historic U.S.-DPRK summit at the Capella Hotel on Sentosa island on June 12, 2018 in Singapore. U.S. President Trump and North Korean leader Kim Jong-un held the historic meeting between leaders of both countries on Tuesday morning in Singapore, carrying hopes to end decades of hostility and the threat of North Korea's nuclear program. (Photo by Kevin Lim/THE STRAITS TIMES/Handout/Getty Images)
Now playing
01:56
Kim Jong Un snubbed Mike Pompeo, source says
WASHINGTON, DC - MAY 09:  National Security Adviser John Bolton speaks on a morning television show from the grounds of the White House, on May 9, 2018 in Washington, DC. Yesterday President Donald Trump announced that America was withdrawing from the Iran nuclear deal.  (Photo by Mark Wilson/Getty Images)
PHOTO: Mark Wilson/Getty Images
WASHINGTON, DC - MAY 09: National Security Adviser John Bolton speaks on a morning television show from the grounds of the White House, on May 9, 2018 in Washington, DC. Yesterday President Donald Trump announced that America was withdrawing from the Iran nuclear deal. (Photo by Mark Wilson/Getty Images)
Now playing
01:34
Bolton: US has plan for denuclearizing N. Korea
PHOTO: Planet Labs Inc.
Now playing
01:25
Satellite images show missile plant construction
PHOTO: CNN
Now playing
01:14
Susan Rice: Kim Jong Un beat Trump at summit
Images of the Norrth Korea missile launch on November 28 taken from Rodong Sinmun, North Korea's official newspaper.
PHOTO: From Rodong Sinmun
Images of the Norrth Korea missile launch on November 28 taken from Rodong Sinmun, North Korea's official newspaper.
Now playing
02:14
Will North Korea restart nuclear tests?
PHOTO: Photo Illustration/Getty Images
Now playing
03:00
Will Kim Jong Un ever give up his nukes?
PHOTO: Photo Illustration/Getty Images
Now playing
02:27
What's bringing Kim Jong Un to the table
Now playing
01:51
Who is Kim Jong Un?
PHOTO: CNN
Now playing
01:43
Connolly: Trump comment on Kim 'jaw-dropping'
Now playing
02:31
Moon: The masterful dealmaker
Trump Kim Jong Un comment 04240218
PHOTO: CNN
Trump Kim Jong Un comment 04240218
Now playing
01:26
Trump: Kim Jong Un very open and honorable
Now playing
03:06
Finding art on the edge of the DMZ

His unscheduled remarks, on a flight out of the region early Wednesday, appeared designed to dial back the unprecedented rhetoric from Trump.