Reports of deaths and disappearances involving at least 11 scientists linked to U.S. aerospace, defense, and research programs since 2022 have prompted a congressional inquiry. House Oversight Committee leaders, including Representative James Comer, requested briefings from federal agencies, citing potential national security concerns. While officials have not confirmed any connection among the cases, the FBI is reviewing possible links involving classified information or foreign actors. The White House and NASA say they are cooperating with the investigation. Authorities stress that no conclusions have been reached, and investigators are examining whether any common factors exist among the incidents.