US Air Force B-1B heavy bombers from Guam linked up with fighter jets from the Air Self-Defense Force on Sept. 9, the anniversary of North Korea's founding, for the latest training drill between the two militaries amid soaring tensions on the Korean Peninsula.
The two B-1Bs from Andersen Air Force Base on Guam trained over the East China Sea with two ASDF F-15 fighters based in Naha, Okinawa Prefecture, the Defense Ministry said in a statement.
US Pacific Air Forces spokeswoman Lt. Col. Lori Hodge said the mission "was not in response to any current event" and had been planned in advance.
"The purpose of this bilateral training is to foster increased interoperability between Japan and the US," Hodge said.
Lt. Col. Lori Hodge. Photo from Angelo State University.
"Following the operation, one B-1B flew to Misawa Air Base to be a static display for the Misawa Air Festival, while the other B-1B returned to Andersen Air Force Base," she added.
The flight by the B-1Bs was the first since North Korea conducted its sixth nuclear test, which it claimed was of a hydrogen bomb capable of being loaded onto an intercontinental ballistic missile.
The North called that test a "perfect success," and the Yonhap news agency, quoting a senior US official on condition of anonymity, reported late Sept. 8 that Washington believed the blast was likely of a hydrogen bomb.
"We're still assessing that test," the official was quoted as saying.
A Japan Air Self Defense Force F-15 (F-15DJ) in flight, as viewed from the boom operator position of a US Air Force KC-135 from the 909th Air Refueling Squadron. USAF photo by Angelique Perez.
"I can say that so far there's nothing inconsistent with the North Korean claim that this was a hydrogen bomb, but we don't have a conclusive view on it yet," the official said.
Seoul had said that Pyongyang would follow the nuclear test with another missile launch over the weekend.
The last reported incidence of the US sending B-1Bs to the area came on Aug. 31, in a "direct response" to North Korea's unprecedented launch over Japan of a missile designed to carry a nuclear weapon two days earlier.
In that exercise, the US sent four F-35s -- one of the military's most advanced stealth fighter jets -- to accompany two B-1Bs for a joint training drill with the ASDF over Kyushu airspace. The fighters and bombers later linked up over the Korean Peninsula with South Korean Air Force F-15Ks for a flight and bomb-dropping exercise simulating precision strikes against the North's "core facilities," according to the US Pacific Command and South Korea's Defense Ministry.
B-1B Lancers fly in formation. Photo by US Forces Korea
Overflights of the Korean Peninsula by heavy bombers such as the B-1B have incensed Pyongyang. The North views the joint exercises by what it calls "the air pirates of Guam" as a rehearsal for striking its leadership and has routinely lambasted them as "nuclear bomb-dropping drills."
While not nuclear-capable, the B-1B -- six of which are currently positioned in Guam, 3,360 km from North Korea -- is regarded as the workhorse of the US Air Force and has been modernized and updated in recent years.
The North said last month that it had drawn up plans to simultaneously launch four intermediate-range ballistic missiles into waters near Guam, with a flight plan that would see them fly over Shimane, Hiroshima and Kochi prefectures.
North Korean leader Kim Jong Un later backed off that threat, saying he would "watch a little more the foolish and stupid conduct" of the United States.
Washington formally requested a vote of the UN Security Council for Sept. 11 on proposed tough new sanctions against the reclusive country.