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Trump says he wants to resume nuclear testing. Here’s what that would mean
A sub-surface atomic test is shown March 23, 1955 at the Nevada Test Site near Yucca Flats, Nev.
AP/U.S. Atomic Energy Commission
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AP/U.S. Atomic Energy Commission
President Trump said on Thursday that the U.S. would begin testing nuclear weapons again for the first time in decades.

“We’ve halted many years ago, but with others doing testing I think it’s appropriate to do so,” the president told reporters aboard Air Force One.
Experts say that the resumption of testing would be a major escalation and could upend the nuclear balance of power.
“I think a decision to resume nuclear testing would be extremely dangerous and would do more to benefit our adversaries than the United States,” said Corey Hinderstein, vice president for studies at the Carnegie Endowment for Nuclear Peace.
Here’s what a test would involve, and why the president might be calling for one now.
There’s currently only one place America could test a nuke — near Las Vegas, Nevada
The Nevada National Security Site, approximately 60 miles northwest of Las Vegas, is currently the only place where America could test a nuclear weapon, says Robert Peters, a senior research fellow for strategic deterrence at the Heritage Foundation.

The Nevada site is around 1,300 square miles in size, larger than the state of Rhode Island. Starting in the 1950s, scientists conducted atmospheric nuclear tests at the site, but from 1962 to 1992, testing was done underground.
Today, testing would likely be done in “a complex of deep underground mineshafts,” Peters said.
Scientists dig a deep shaft either directly below ground or into the side of a mountain. They then put a nuclear device in a chamber at the end of the shaft and seal it up. The detonation is contained by the rock, reducing the risk of atmospheric fallout.
Although underground testing is far safer than atmospheric testing, it still carries risks, said Hinderstein. In the past, some radioactive fallout has leaked from test shafts. Additionally, the test could shake buildings as far away as Las Vegas, and Hinderstein said some of the newer buildings in Vegas could even be at risk of damage.
“All of these big highrises — including Stratosphere, including the Trump Hotel,” she said. “They’re not designed for massive, significant seismic activity.”
America’s last test in Nevada was over 30 years ago
At the end of the Cold War, the nation’s major nuclear powers declared a voluntary moratorium on nuclear testing. Russia, then the Soviet Union, tested its last nuclear weapon in 1990, the U.S. conducted its final test in 1992, and China conducted its last test in 1996.
The U.S. conducted hundreds of underground tests in Nevada. Each massive explosion created a subsidence crater visible at the surface.
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The voluntary test moratorium has been in place as part of an effort to maintain nuclear stability. The U.S currently uses scientific experiments and supercomputer simulations to make sure its bombs still work.
Last year, NPR was one of a handful of organizations granted rare access to the top-secret underground tunnels where the tests take place. Scientists working in the tunnels said they were confident they could continue to ensure the safety of America’s nuclear weapons without testing.
Although a full-scale nuclear detonation would be “complementary” to current experiments, “our assessment is that there are no system questions that would be answered by a test, that would be worth the expense and the effort and the time,” Don Haynes, a nuclear weapons scientist from Los Alamos National Laboratory told NPR as they walked through the tunnels.
Indeed Hinderstein says, preparing for a nuclear test is no small matter. While a basic demonstration test could be done in approximately 18 months. Conducting a test that would produce scientifically useful data would likely take years.
In this photo taken from video distributed by Russian Defense Ministry Press Service on Wednesday, Oct. 22, 2025, the crew of the Bryansk nuclear submarine of the Russian navy prepares to conduct a practice launch of an intercontinental ballistic missile during the drills of Russia’s nuclear forces.
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Trump’s announcement is likely reacting to some recent tests by Russia
On Sunday, Russia announced it had conducted a successful test of a new nuclear-powered cruise missile. Then on Wednesday President Vladimir Putin announced the successful test of another doomsday weapon — a nuclear-powered underwater drone, which Russia says can be used to attack coastal cities.
Trump never called out Russia by name, but he did suggest recent testing was behind the announcement. “I see them testing,” he said aboard Air Force One, “and I say, ‘Well if they’re going to test I guess we have to test.’”
While testing nuclear-powered weapons is not the same as testing nuclear weapons themselves, Russia’s tests are highly provocative. They come just months before the expiration of the last nuclear treaty between the U.S. and Russia, designed to put limits on their arsenals.
The back-and-forth has all the hallmarks of the start of an arms race, noted Jon Wolfsthal, the director of global risk at the Federation for American Scientists.
“We saw this play out throughout the Cold War through nuclear testing, nuclear deployments, nuclear investments,” he said.
Many experts warn that now is not the time to resume nuclear testing
Hinderstein, who served as a deputy administrator of the National Nuclear Security Administration, the agency responsible for America’s nuclear weapons, from 2021-2024, said that a decision to resume testing would not be in America’s interests.
At the end of the Cold War, the U.S. had conducted more than a thousand nuclear tests — far more than any other nation (China, by comparison had conducted just 45).
Other nations, “have more to gain by resuming nuclear testing than the United States does,” she said.
Testing would likely be expensive adds Paul Dean, vice president for global nuclear policy at the Nuclear Threat Initiative. “The cost estimates I’ve seen have been at around, ballpark, $140 million per test,” he said.
“It’s not necessary to conduct a nuclear explosive test right now” agreed Robert Peters of the Heritage Foundation. But he added. “But there very well be compelling reasons to test in the coming months and years. That’s how bad things are getting.”
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“It’s blood money”: Family of exonerated man in Texas yogurt shop murders speaks out after settlement
The widow and the daughter of Maurice Pierce, one of the four men wrongfully accused in the 1991 Texas yogurt shop murders, have confirmed they signed a multimillion-dollar settlement with the city of Austin.
Kimberli and Marisa Pierce spoke with correspondent Erin Moriarty in a new episode of the podcast “48 Hours: Case by Case.” Moriarty has reported on the yogurt shop murders for over 30 years.
Maurice Pierce’s widow Kimberli made clear that their priority has never been financial compensation. “It’s blood money for us. He died for this money,” Kimberli Pierce said. “It’s about the reform and the changes that need to happen, not only in Austin, but apparently across the country.”
They also went into great detail about what they believe happened when Maurice Pierce was shot and killed by police in 2010.
Maurice Pierce was one of four men, along with Michael Scott, Robert Springsteen and Forrest Welborn, who were wrongfully accused in the murders of four teenage girls in Austin on Dec. 6, 1991. Eliza Thomas, Amy Ayers, and sisters Jennifer and Sarah Harbison were tied up, shot and left inside the yogurt shop as it was set ablaze.
The four men were exonerated in February after investigators linked another man, Robert Eugene Brashers, to the killings. The city of Austin subsequently offered a $35 million settlement. Because Maurice Pierce died in 2010, his share of $10 million will go to Kimberli and Marisa Pierce.
Eight days after the killings, 16-year-old Maurice Pierce was arrested at a mall, carrying a .22, the same caliber handgun connected to the crime. Kimberli Pierce said police told Maurice Pierce that his gun was the murder weapon. He responded by mentioning his friend Forrest Welborn. Maurice Pierce was then wired up and sent to speak with Welborn, but investigators ultimately determined that Welborn and the others knew nothing about the murders, and no charges were filed at that time.
Marisa Pierce has said there was no evidence when her father was questioned, “only a detective and a narrative, a narrative so completely false. It feels evil.”
Nearly eight years later, in 1999, all four men were arrested after Scott and Springsteen confessed to the murders. They later recanted, saying they had been coerced. Springsteen and Scott were tried and convicted, but later those convictions were overturned on constitutional grounds. A subsequent DNA test excluded all four men. Maurice Pierce was never convicted but spent three years in jail before his release in 2003.
Kimberli Pierce said her husband came home a hardened man. She believes police continued to harass Maurice and their family after his release. In 2010, Maurice Pierce was stopped for a routine traffic stop, fled on foot, and was shot and killed by an Austin police officer who said Pierce had stabbed him with a knife.
Marisa and Kimberli Pierce told “48 Hours” that they intend to review the circumstances surrounding the night of Maurice Pierce’s death. Marisa Pierce revealed in new, emotional detail that she was on the phone with her father at the time. She believes he panicked and was only trying to get away, not to hurt anyone. She described her father’s last breaths: “And in those last moments, he had just said I’m sorry, I don’t think you’re gonna see me again, and I love you.”
“48 Hours” reached out to the Austin Police Department about the Pierces’ allegations of harassment and their questions about Maurice Pierce’s death in 2010. The police department said they had no additional comment.
For the Pierce family, the settlement is a starting point, not an end point. They have put forward seven proposed reforms they hope the city of Austin will approve, including appointing a child advocate whenever a minor is questioned, prohibiting deceptive interrogation tactics, educating juveniles about their rights and establishing accountability measures to address tunnel vision in police investigations.
In a statement shared with “48 Hours,” the Pierces wrote: “Real justice is not only about acknowledging harm after the fact but about creating safeguards that prevent future families from enduring the same pain.”
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The Maine Town That Actually Wants a Data Center
This year, Maine nearly became the first state to pass a statewide moratorium on new data centers. But before the law could take effect, supporters of an A.I. data center project in the small town of Jay rallied to fight the ban — and won. So why do residents there want one? We traveled to Jay to find out.
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The Supreme Court says the U.S. can turn away asylum seekers at the border
The U.S. Supreme Court
Drew Angerer/AFP via Getty Images
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Drew Angerer/AFP via Getty Images
The U.S. Supreme Court on Thursday handed the Trump administration a tool that could make it far more difficult for asylum seekers to enter the United States.
Asylum is a form of legal protection available to people fleeing persecution in their home countries if they meet certain criteria. Under U.S. law, an asylum seeker who “arrives in” the U.S. is entitled to apply for asylum and generally cannot be removed from the country until their asylum application is processed.
By a 6-3 vote, the high court ruled that federal law allows the government to stop asylum seekers from physically setting foot in the country, effectively keeping them from applying for asylum.
The Obama administration was the first to try stemming the flow of asylum seekers that way. But the lower courts blocked the policy on grounds that it violated federal law by denying asylum to people who otherwise would have qualified for it, had they been permitted to literally put one foot over the border.
The Trump administration, however, sought to revive the policy, contending that the lower court’s ruling “deprives the Executive Branch of a critical tool for addressing border surges and preventing overcrowding at ports of entry.” And on Thursday, the Supreme Court agreed.
Writing for the majority, Justice Samuel Alito ruled that because asylum seekers are not in the U.S. when they are turned away at the border, they did not “arrive in” the country. Therefore, he continued, the legal protections for asylum seekers have not kicked in.
Writing for the liberal dissenters, Justice Sonia Sotomayor noted that Border Patrol agents speak with all immigrants at legal entry points and speaking with an agent is effectively the first step in “arriving in” the U.S.
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