Ten government workers tied to nuclear and space programs have disappeared or died over three years, prompting Trump to suggest a possible connection — but FBI investigators and Energy Department officials say they've found no evidence linking the cases. The disappearances include a retired general in New Mexico, an MIT professor killed by a former classmate, and others scattered across different locations and organizations. Security experts note that while foreign espionage is a real concern at these facilities, the deaths appear unconnected and mostly involve mundane explanations: strokes, suicide, mugging — not assassination plots.