US nuke commander ‘assumes’ North Koreans tested H-bomb

A woman walks by a TV screen showing a local news program reporting about North Korean military's plans to launch missiles into waters near Guam, with an image of North Korean leader Kim Jong Un, at Seoul Train Station in Seoul, South Korea, Tuesday, Aug. 15, 2017. North Korea said Tuesday that leader Kim Jong Un was briefed on his military's plans to launch missiles into waters near Guam as part of an effort to create "enveloping fire" near the U.S. military hub in the Pacific. The part of letters on the bottom "Korean Central News Agency, Kim Jong Un visits the army's Strategic Forces." (AP Photo/Lee Jin-man)

OFFUTT AIR FORCE BASE, Neb. (AP) — The top commander of U.S. nuclear forces said Thursday he assumes the Sept. 3 nuclear test by North Korea was a hydrogen bomb, suggesting a heightened U.S. concern that the North has advanced to a new level of nuclear firepower.

Air Force Gen. John E. Hyten, commander of Strategic Command, told reporters that while he was not in a position to confirm it, he assumes from the size of the underground explosion and other factors that it was a hydrogen bomb — which is a leap beyond the fission, or atomic, bombs North Korea has previously tested.

Just moments after Hyten spoke at his headquarters near Omaha, reports from South Korea said the North had launched a missile. Hyten made no mention of it, and the initial reports of the launch were sketchy on details.

North Korea claimed they exploded a hydrogen bomb, and while U.S. officials have not contradicted them, they have not confirmed it, either. Administration officials had indicated they saw nothing to contradict the North’s claim. Hyten went further, saying the characteristics of the test made him think it was an H-bomb.

Hyten would not discuss the exact size of the explosion from the Sept. 3 test, but Defense Secretary Jim Mattis said Wednesday that it was in excess of 100 kilotons — far larger than any of the North’s five previous nuclear tests.

“When I look at a thing that size, I as a military officer assume that it’s a hydrogen bomb,” Hyten said. As head of Strategic Command, he would be in charge of all elements of the U.S. nuclear force in the event of nuclear war.

“I have to (assume this),” he added, “I have to make that assumption. What I saw equates to a hydrogen bomb. I saw the event. I saw the indications that came from that event. I saw the size, I saw the reports, and therefore to me I’m assuming it was a hydrogen bomb.”

Asked whether it matters that the North Koreans had advanced to testing a hydrogen bomb, Hyten said, “Yes. The change from the original atomic bomb to the hydrogen bomb for the United States” in the 1940s changed America’s strategic relationship with the Soviet Union because of “the sheer destruction and damage you can create with a weapon that size.” The Soviets quickly matched the U.S. by exploding their own hydrogen bomb well before U.S. officials believed possible.

Pressed further, Hyten said he was not confirming that it was a hydrogen bomb.

“I’m just saying the size of the weapon shows that there was clearly a secondary explosion,” he said.

Until a fission, or atomic, bomb, a hydrogen bomb is built with two “stages,” or explosive devices that work in tandem to create fusion.

Hyten would not say how large the explosion was, but Defense Secretary Jim Mattis said on Wednesday that it was more than 100 kilotons, which could put it in the category of an H-bomb.

Hyten said that while he believes it is only a matter of time before the North Koreans have a reliable nuclear-armed missile capable of hitting the United States, they probably still have more test work to do.

“They haven’t put everything together yet,” he said, referring to the ability to build a long-range missile with a nuclear warhead that can survive the extreme heat generated by re-entering the Earth’s atmosphere on its way to a U.S. target. He said it would not be a surprise if the North Koreans were able to do that in fairly short order; he said it took the U.S. “less than a couple of years.” provides commenting to allow for constructive discussion on the stories we cover. In order to comment here, you acknowledge you have read and agreed to our Terms of Service. Commenters who violate these terms, including use of vulgar language or racial slurs, will be banned. Please be respectful of the opinions of others and keep the conversation on topic and civil. If you see an inappropriate comment, please flag it for our moderators to review.

Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s