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   Ukrainian soldiers advised an elite British unit on how to train troops for drone warfare. They said about 60 hours of flying is needed to reach competence. They advised that pilots should start on a simulator. The US Army also uses one on Ukrainian advice. Lt. Col. Ben Irwin-Clark, the commanding officer of the 1st Battalion of the Irish Guards, an elite British Army infantry regiment, told Business Insider that the Ukrainians said a decent pilot needs at least 30 hours on a simulator and 30 hours of actual flying in the field. At about 60 hours, "they are pretty competent at being able to fly different types of drones," he said. After that, improvement comes with repetition and exposure to more systems. "It's an upward curve in terms of how good they can get," he said. It takes practice. The battalion received those lessons while it was helping train Ukrainian troops for their fight against Russia's invasion. The unit was deployed in support of Operatio...

  US accuses China of breaking rules on nuclear weapons by hiding explosions and preparing for more testing The US accused China of secret nuclear explosive testing and attempting to cover it up, an official said Friday. The US said it has intelligence that China conducted banned nuclear explosive tests. The nuclear monitoring organization said it hadn't detected activity related to an explosive test. China is expanding its nuclear arsenal. An explosive test would violate an international agreement. Banned for decades under an international agreement to which China and the US are signatories, nuclear explosive testing involves the detonation of warheads. The US accusation comes on the heels of the expiration of the nuclear arms control New START agreement between the US and Russia, which limited their numbers of deployed warheads and launchers. "I can reveal that the US government is aware that China has conducted nuclear explosive tests, including preparing for tests with des...

   CVE-2025-22225, a VMware ESXi arbitrary write vulnerability, is being used in ransomware campaigns, CISA confirmed on Wednesday by updating the vulnerability’s entry in its Known Exploited Vulnerabilities (KEV) catalog. Researchers linked VMware ESXi zero-day trio to single exploit toolkit Broadcom fixed CVE-2025-22225, CVE-2025-22224 (a heap overflow vulnerability) and CVE-2025-22226 (an information disclosure flaw) in VMware ESXi, Workstation, and Fusion in early March 2025. At the time of their disclosure, Broadcom said that they have information to suggest that the three vulnerabilities have been exploited in the wild as zero-days, but details about the attacks were not shared. The three flaws were added to CISA’s KEV catalog on the same day. In January 2026, Huntress researchers observed attackers using an exploit toolkit they believe takes advantage of all three vulnerabilities. “Based on our analysis of the exploit’s behavior, its use of HGFS for information leaking,...