Lawmakers demand answers as scientists tied to US secrets die or vanish

This material may not be published, broadcast, rewritten, or redistributed. ©2026 FOX News Network, LLC. All rights reserved. Quotes displayed in real-time or delayed by at least 15 minutes. Market data provided by Factset. Powered and implemented by FactSet Digital Solutions. Legal Statement. Mutual Fund and ETF data provided by LSEG. FBI investigates mysterious deaths and disappearances of scientists working on nuclear and space research. Chris Swecker, a former assistant director for the FBI, discusses what he considers the 'common denominator' in the cases and more. House Republicans are pressing multiple federal agencies for answers about reports that at least 10 individuals tied to sensitive U.S. nuclear and aerospace programs have died or disappeared in recent years, with lawmakers pointing to public reporting that raises questions about a possible "sinister connection" between the cases. In letters sent Monday, House Oversight Committee Chairman James Comer, R-Ky., and Subcommittee Chairman Eric Burlison, R-Mo., request briefings from the FBI, Department of Energy, NASA and Department of War, citing what they describe as "unconfirmed public reporting" surrounding the incide