Congress, FBI probe mystery surrounding scientists' deaths and disappearances

Lawmakers and federal investigators are opening a broad probe into reports that at least 10 scientists tied to sensitive U.S. nuclear and aerospace research have died or disappeared in recent years. The FBI is coordinating with the Defense Department, Energy, NASA and state/local authorities, while the House Oversight Committee seeks briefings on potential connections. Cases vary from unsolved homicides to missing-person searches, with no confirmed links so far, though officials say it’s a national-security concern and that authorities will look for ties to classified information or foreign actors.