Big trouble for US, China... top defense scientists continue to disappear, reason UNKOWN

Written By: Nivedita Dash Updated by: Nivedita Dash
Updated Date:April 25, 2026 3:57 PM IST

More than 11 scientists have disappeared or been found dead in the US, while nine have died in China. All of them were involved in fields such as nuclear, hypersonic, AI, and space research.

The deaths and disappearances of top defense scientists are increasing in the US and China. These scientists were working in highly sensitive areas such as nuclear technology, hypersonic weapons, artificial intelligence, space research, and advanced weapons. So far, 11 incidents have been reported in the US, while more than 9 scientists have died in China. While these incidents appear normal, the pattern behind them raises suspicions of conspiracy.

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Scientists are missing and dying in US

In the US, numerous scientists are suddenly disappearing or dying. These include NASA engineers, Air Force generals, and scientists at nuclear labs like Los Alamos.

The most famous case is that of Major General William Neil McCasland. He investigated UFOs (unidentified flying objects) and served as commander of the Air Force Research Laboratory. In February 2026, he left home for a walk and then disappeared. He left his phone, glasses, and smartwatch at home, taking only a revolver with him. He has not been found to date.

Similarly, Monica Reza, an aerospace engineer at NASA's Jet Propulsion Laboratory, was trekking with friends in the California woods. Suddenly, she fell 30 feet behind the trail and disappeared. Rescue teams searched for days, but found no trace. She was working on a super-alloy metal used in rockets.

Joshua LeBlanc, a 29-year-old engineer working on NASA's nuclear propulsion project, died in a fire in his Tesla car. His family says he failed to arrive for work and left his phone and wallet at home.

Melissa Casias, an administrative assistant at the Los Alamos Nuclear Lab, and Anthony Chavez, a retired scientist, also disappeared. In many cases, the scientists left their homes on foot and never returned.

Suspicious deaths of scientists in China

Similar cases are also increasing in China. At least nine scientists have died in the past few years. Most deaths are attributed to car accidents, sudden illness, or unknown causes.

The most high-profile case is that of Feng Yanghe. The 38-year-old professor worked at the National University of Defense Technology, developing an AI simulation model related to Taiwan. He died in a car accident in Beijing at 2:35 a.m. in July 2023. The official report described his death as "sacrifice in the line of duty," a term commonly used for military personnel.

Scientist who died in last ten years

  1. Chen Shuming (57) microelectronics expert, car accident in 2018
  2. Zhou Guangyuan Chemist, December 2023
  3. Zhang Xiaoxin (62) Space expert, car accident in December 2024
  4. Fang Daining hypersonics expert, medical episode abroad in February 2026
  5. Yan Hong hypersonics researcher, dies of illness in March 2026

These scientists were working in areas like hypersonic weapons, military AI, swarm technology and nuclear research.

Trump terms it serious

President Donald Trump has called it pretty serious stuff. The FBI has launched an investigation. Many former officials and lawmakers believe that enemy nations are targeting scientists to undermine American technology.

So far, there's no concrete evidence that this is a major conspiracy. Some experts say that with so many people in such large organizations (NASA, Air Force, etc.), some accidents or suicides could have occurred. But the pattern of events leaving home without a phone or wallet, walking, and then disappearing seems quite suspicious.

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