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Climate Change Primed LA to Burn — Catastrophically
A new analysis finds that human-caused warming helped dry out the vegetation that turned Los Angeles into a firestorm.
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Diseased Illegal Immigrants Aren’t “Invading” the United States
My research at the Cato Institute on crime and terrorism committed by illegal immigrants conclusively shows that they commit less crime than native-born Americans and have murdered zero people in domestic attacks since 1975. We also fond no statistically significant relationship between the size of the immigrant population, the illegal immigrant population, or the legal immigrant population and the spread of serious communicable diseases.
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How Ruhr University is Combatting Right-Wing Extremist Activities
“The constitutional principles of freedom of opinion, which we seek to protect and defend, don’t allow people to be sanctioned because of their presumed beliefs. This also applies to neo-Nazis. However, we do not stand idly by”: Ruhr University Bochum’s vice rector.
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Madison and Nashville School Shooters Appear to Have Crossed Paths in Online Extremist Communities
A month after a student opened fire at Abundant Life Christian School, another killed a classmate at Antioch High School. Both were active in an internet subculture that glorifies mass shooters and encourages young people to commit attacks.
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Antioch, Tenn., Shooter Inspired by Broad Extremist Beliefs and Previous Mass Killers
On January 22, 2025, a 17-year-old student opened fire inside the cafeteria at Antioch High School in Nashville, Tennessee. The shooter subscribed to broad accelerationist beliefs, which hold that society is irrevocably broken and must be destroyed to be rebuilt.
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Bystander Reporting Helps Prevent Mass Violence
Bystander reporting’s role in mitigating mass violence deserves much more attention –because peers, bystanders, and “bystanders of bystanders” often know a lot about a person’s concerning behavior, and because they often choose not to report because they perceive authority figures are not receptive or are unlikely to be helpful.
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5 Israeli Innovations for Fighting Wildfires
As regions from California to the Mediterranean face wildfire threats, these innovations can help win the battle against out-of-control flames.
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Will Trump Spark a Mineral 'Gold Rush' in Greenland?
The mineral wealth on the Arctic island of Greenland is in the global spotlight after U.S. President Donald Trump said he wants to take control of the territory from Denmark, prompting alarm from European allies.
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Southport Attack: Changing the Definition of Terrorism Won’t Stop the Violence
Axel Rudakubana, who killed of three young girls in Southport in a stabbing attack in 2024, had been referred to the Prevent counter-terrorism program three times, but failed to meet the threshold for intervention. Some want to change terror laws to deal with lone, violent killers. But as a researcher of counter-terrorism laws, I argue there is little point to widening what is already a broad definition of terrorism.
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In Times of Crisis, States Have Few Tools to Fight Misinformation
While officials in Southern California fought fire and falsehoods, Meta —the parent company of Facebook and Instagram —announced it would eliminate its fact-checking program in the name of free expression. As social media companies are pushing back against efforts to crack down on falsehoods, questions are asked about what, if anything, state governments can do to stop the spread of harmful lies and rumors that proliferate on social media.
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House Democrat Pushes Bill Requiring Liability Policy to Buy or Possess Firearms
Under a bill proposed Monday, the legislative majority is pushing to require proof of “financial responsibility” before purchasing or possessing a firearm by requiring certain liability policies.
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Monitoring Space Traffic
AeroAstro Ph.D. student Sydney Dolan uses an interdisciplinary approach to develop collision-avoidance algorithms for satellites.
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Russia's Arctic Militarization Behind Trump's Focus on Greenland
The United States has long viewed Greenland as vitally important for its defense. With Russia investing heavily in its Arctic military footprint in recent years, the importance of Greenland to the United States is increasing.
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Proud Boys: A Big Tent for Hate
Some of those pardoned by President Trump are leaders and members of the Proud Boys, a right-wing extremist group with a history of using violence, targeted harassment, and intimidation to achieve their political goals and combat perceived enemies – Jews, Muslims, gays, progressives, and feminists.
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Acoustic Sensors Find Frequent Gunfire on School Walking Routes
A new study used acoustic sensors that detect the sound of gunfire to show how often children in one Chicago neighborhood are exposed to gunshots while walking to and from school. The study documents toll on kids in the community.
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The long view
Are We Ready for a ‘DeepSeek for Bioweapons’?
Anthropic’s Claude 4 is a warning sign: AI that can help build bioweapons is coming, and could be widely available soon. Steven Adler writes that we need to be prepared for the consequences: “like a freely downloadable ‘DeepSeek for bioweapons,’ available across the internet, loadable to the computer of any amateur scientist who wishes to cause mass harm. With Anthropic’s Claude Opus 4 having finally triggered this level of safety risk, the clock is now ticking.”
“The Federal Government Is Gone”: Under Trump, the Fight Against Extremist Violence Is Left Up to the States
As President Donald Trump guts the main federal office dedicated to preventing terrorism, states say they’re left to take the lead in spotlighting threats. Some state efforts are robust, others are fledgling, and yet other states are still formalizing strategies for addressing extremism. With the federal government largely retreating from focusing on extremist dangers, prevention advocates say the threat of violent extremism is likely to increase.
Luigi Mangione and the Making of a ‘Terrorist’
Discretion is crucial to the American tradition of criminal law, Jacob Ware and Ania Zolyniak write, noting that “lawmakers enact broader statutes to empower prosecutors to pursue justice while entrusting that they will stay within the confines of their authority and screen out the inevitable “absurd” cases that may arise.” Discretion is also vital to maintaining the legitimacy of the legal system. In the prosecution’s case against Luigi Mangione, they charge, “That discretion was abused.”
Autonomous Weapon Systems: No Human-in-the-Loop Required, and Other Myths Dispelled
“The United States has a strong policy on autonomy in weapon systems that simultaneously enables their development and deployment and ensures they could be used in an effective manner, meaning the systems work as intended, with the same minimal risk of accidents or errors that all weapon systems have,” Michael Horowitz writes.
Ukraine Drone Strikes on Russian Airbase Reveal Any Country Is Vulnerable to the Same Kind of Attack
Air defense systems are built on the assumption that threats come from above and from beyond national borders. But Ukraine’s coordinated drone strike on 1 June on five airbases deep inside Russian territory exposed what happens when states are attacked from below and from within. In low-level airspace, visibility drops, responsibility fragments, and detection tools lose their edge. Drones arrive unannounced, response times lag, coordination breaks.
Shots to the Dome—Why We Can’t Model US Missile Defense on Israel’s “Iron Dome”
Starting an arms race where the costs are stacked against you at a time when debt-to-GDP is approaching an all-time high seems reckless. All in all, the idea behind Golden Dome is still quite undercooked.