US Still in Dark over Mystery Flying Objects, Rejects China Balloon Accusation

National Security Council spokesman John Kirby addressed growing speculation over the spate of unidentified objects shot down over North America. MANDEL NGAN / AFP
National Security Council spokesman John Kirby addressed growing speculation over the spate of unidentified objects shot down over North America. MANDEL NGAN / AFP
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US Still in Dark over Mystery Flying Objects, Rejects China Balloon Accusation

National Security Council spokesman John Kirby addressed growing speculation over the spate of unidentified objects shot down over North America. MANDEL NGAN / AFP
National Security Council spokesman John Kirby addressed growing speculation over the spate of unidentified objects shot down over North America. MANDEL NGAN / AFP

The White House responded Monday to growing and at times fevered speculation over the shooting down of unidentified aerial objects by saying the targets could be anything from commercial craft to espionage devices, while denying that US balloons spy on China.

After mounting pressure on President Joe Biden's administration to explain the unprecedented situation that has seen an alleged Chinese spy balloon and three mystery objects shot down in North America in just over a week, officials appeared sure of only one thing: It's not aliens, AFP said.

"I just wanted to make sure we address this from the White House," Biden's press secretary, Karine Jean-Pierre said at the top of the first full-blown briefing since the latest shoot-down of an unidentified object Sunday.

"There have been questions and concerns about this but there is no -- again, no -- indication of aliens or extraterrestrial activity."

What actually is going on, however, remains unclear.

According to the US government, the first of the four objects -- a sophisticated, high-altitude balloon shot down on February 4 off the coast of South Carolina -- was part of an ongoing, global "fleet" of Chinese espionage balloons.

China denied this, calling the huge balloon an errant weather research craft, and lashed out at Washington on Monday. Beijing said more than 10 US balloons entered Chinese airspace "without any approval" over the last year.

As for another high-altitude balloon spotted in Latin America, China says that was a civilian flight test device.

White House National Security Council spokesman John Kirby told reporters the US is "not flying surveillance balloons over China."

"I'm not aware of any other craft that we're flying over into Chinese airspace," he said.

- Uncertain origins, objectives -
The United States says the large Chinese balloon down on February 4 was obviously a spy craft and that the debris is currently being plucked from the Atlantic Ocean for analysis.

Crews have recovered important sensor and electronics parts from the balloon, as well as large parts of the structure, the US military said Monday.

The other three unidentified objects -- shot down Friday over Alaska, Saturday over the Yukon in Canada, and Sunday over Lake Huron on the US-Canadian border -- were much smaller, less sophisticated, and were flying lower than the Chinese balloon from earlier this month.

US officials know little about them -- not even to whom they belonged.

"Countries, companies, research and academic organizations operate objects at these altitudes for purposes that are not nefarious at all, including scientific research," Kirby said.

Whether they were spying also remains unknown.

"Even if we have no indications that any of these three objects were surveilling, we couldn't rule that out," he said.

Officials also say that the perceived increase in incidents could be due to an adjustment in radar settings after February 4, which means items once passing unseen are now caught.

"One of the reasons that we think we're seeing more is because we're looking for more," Kirby said.

The truth will not be clear until debris is collected and that is not simple, either.

In the case of the large Chinese balloon, sea conditions made diving impossible Monday, Kirby said, while the three subsequent craft were brought down in "pretty remote, difficult areas to reach."

Canadian Public Safety Minister Marco Mendicino called the location of the debris of the unidentified object shot down over the Yukon on Saturday "extremely challenging and difficult to access."

- China tensions -
In Washington, the extraordinary events are fueling already intense suspicion about China across both the Democratic and Republican parties -- a trend likely to grow as the 2024 presidential election approaches.

The diplomatic fallout has already been substantial, with Secretary of State Antony Blinken abruptly canceling a rare visit to Beijing.

China's accusations of US spying prompted National Security Council spokeswoman Adrienne Watson to allege that Beijing has a high-altitude spying program that has violated the airspace of "40 countries across five continents."

The State Department said China was "scrambling to do damage control" and that the communist government "has failed to offer any credible explanations for its intrusion into our airspace."

But over the weekend, Chinese state-affiliated media reported that an unidentified flying object had been spotted off the country's east coast and that the military was preparing to shoot it down.

Beijing on Monday declined to comment on that report, referring journalists to the defense ministry, which did not respond to requests for comment from AFP.



How the US Used Its Bunker-Buster Bombs at Iranian Nuclear Sites

Chairman of the Joint Chiefs Gen. Dan Caine, responds to a question during a press conference about Operation Midnight Hammer at the Pentagon, June 22, 2025 in Washington, DC. (dpa)
Chairman of the Joint Chiefs Gen. Dan Caine, responds to a question during a press conference about Operation Midnight Hammer at the Pentagon, June 22, 2025 in Washington, DC. (dpa)
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How the US Used Its Bunker-Buster Bombs at Iranian Nuclear Sites

Chairman of the Joint Chiefs Gen. Dan Caine, responds to a question during a press conference about Operation Midnight Hammer at the Pentagon, June 22, 2025 in Washington, DC. (dpa)
Chairman of the Joint Chiefs Gen. Dan Caine, responds to a question during a press conference about Operation Midnight Hammer at the Pentagon, June 22, 2025 in Washington, DC. (dpa)

The deep penetrating bombs that the US dropped into two Iranian nuclear facilities were designed specifically for those sites and were the result of more than 15 years of intelligence and weapons design work, the Pentagon’s top leaders said Thursday.

Defense Secretary Pete Hegseth and Gen. Dan Caine, chairman of the Joint Chiefs of Staff, said at a press briefing that they are confident the weapons struck exactly as planned.

Caine, the nation’s top military officer, offered new details about the work that went into building the “bunker-buster” bombs and how the US used them to burrow into the Iranian sites. He sought to show the level of destruction but did not directly address President Donald Trump’s assertion that Tehran’s nuclear program has been “obliterated.”

Classified briefing

The bombs, called the GBU-57 A/B Massive Ordnance Penetrator, have their roots in a decades-old classified briefing “of what looked like a major construction project in the mountains of Iran,” Caine said.

That turned out to be the Fordo fuel enrichment plant, with construction believed to have started around 2006. It became operational in 2009, the same year Tehran publicly acknowledged its existence.

The classified briefing was shown in 2009 to a Defense Threat Reduction Agency officer, who with a colleague “lived and breathed” Fordo for the next 15 years, studying the geology, construction dig, the earth moved and “every piece of equipment going in and every piece of equipment going out," Caine said.

What they concluded: The US didn't have a bomb that could destroy those sites. So the Pentagon got to work, Caine said.

“We had so many Ph.D.s working on the mock program — doing modeling and simulation — that we were quietly and in a secret way the biggest users of supercomputer hours within the United States of America,” he said.

How the bunker busters are designed

The 30,000-pound bomb is comprised of steel, explosives and a fuse programmed to a specific detonation time. The longer the fuse, the deeper the weapon will penetrate before exploding.

Over the years, the military tested and retested it hundreds of times on mock facilities, Caine said. Crews fine-tuned the bombs to detonate in the mock enrichment rooms, delaying detonation until they had reached a position to send a pressure blast through open tunnels to destroy equipment underground.

How the US said it bombed an Iranian underground nuclear facility

Fordo had two main ventilation routes into the underground facility and officials carefully eyed these entry points as a way to target the site.

Each route had three shafts — a main shaft and a smaller shaft on either side, which looked almost like a pitchfork in graphics provided by the Pentagon. In the days preceding the US attack, Iran placed large concrete slabs on top of both ventilation routes to try to protect them, Caine said.

In response, the US crafted an attack plan where six bunker-buster bombs would be used against each ventilation route, using the main shaft as a way down into the enrichment facility.

Seven B-2 stealth bombers were used, carrying two of the massive munitions apiece. The first bomb was used to eliminate the concrete slab, Caine said.

The next four bombs were dropped down the main shaft and into the complex at a speed of more than 1,000 feet per second before exploding, he said. A sixth bomb was dropped as a backup in case anything went wrong.

In addition to the 12 bombs dropped on Fordo, with six on each ventilation route, two more hit Iran's main Natanz facility, Caine said.

Each crew was able to confirm detonation as they saw the bombs drop from the aircraft in front of them: “We know that the trailing jets saw the first weapons function,” Caine said.

The pilots reported back that it was the brightest explosion they had ever seen — that it looked like daylight, he said.

Questions remain about the whereabouts of Iran's highly enriched uranium

Caine said the munitions were built, tested and loaded properly, guided to their intended targets and then exploded as designed.

“Iran’s nuclear facilities have been destroyed,” Hegseth said.

However, questions remained as to whether the highly enriched uranium that Iran would need to develop a nuclear weapon was at the site at the time. Asked repeatedly, Hegseth did not say if the uranium had been destroyed or moved.

“I’m not aware of any intelligence that I’ve reviewed that says things were not where they were supposed to be — moved or otherwise,” Hegseth said.